Abstract: Bone graft comprising cortical bone material having a screw shank with an external thread and a screw head. Screw head has an outer jacket surface which is rotationally symmetrical about a screw head axis and has an external thread. At least two recesses, which are distributed about the screw head axis, extend axially in the direction of the screw head axis and open into an end face of a free end of the screw head, for receiving an insertion tool. The recesses are each formed by side faces, which extend from the outer jacket surface in the direction of the screw head axis and merge into one another in a surface section close to the axis. By this design, introduction of an insertion torque is optimized and new surgical areas of application such as in intramedullary splinting, arthroscopic insertion and deep insertion of the graft into an bearing bone are possible.

Abstract: A non-magnetic locking sleeve includes an engagement unit disposed in a body which includes a locking socket and a positioning groove. The locking socket is enclosed by a plurality of peripheral walls connected one after another for holding a fastener. The positioning groove is annularly recessed into the peripheral walls for receiving the engagement unit. Preferably, an intersection of two adjacent peripheral walls forms a recessed portion whereby the fastener is held by the peripheral walls more tightly while inserting into the locking socket. A periphery of the engagement unit can be formed with a rough surface or at least one engaging surface to increase a contact area between the engagement unit and the fastener. Accordingly, the fastener is firmly positioned by the locking sleeve to increase the stability of a following fastening operation executed by the fastener.

Abstract: A tool bit includes a drive portion configured to be selectively coupled to a tool. The drive portion is composed of a first material. The tool bit includes a working end portion having a shape configured to correspond with a recess of a fastener for the working end portion to engage and drive the fastener. The working end portion includes a first segment and a second segment. The first segment is located between the second segment and the drive portion. The first segment is composed of the first material. The second segment is fixed to the first segment at a connection interface. The second segment is composed of a second material different than the first material.

Abstract: At least some implementations of the present invention include the ability to access and secure a compressed riser portion of a pop-up sprinkler. Access is gained through use of the tip of the tool, sloped for access clearance between the sprinkler nozzle “lip” and outer sprinkler base. Once raised from the outer sprinkler casing, the riser is secured in a designated clamping bay or within designated clamping points. This two-pronged approach accommodates varying diameter of sprinkler risers and increases the multi-use function of the tool. The tool's overall inward tension is provided by an engineered compression spring designed with adequate outward tension without making hand compression use of the tool restrictive. Use of the tool in an inward sweeping motion toward the sprinkler allows for raising and clamping the riser in a quick and simple fashion. Thereafter, allowing free and open-hand access for quick and thorough maintenance, repair, exchange or adjustment of the sprinkler nozzle and filter.

Abstract: A driving tool is providing, including: a driving end including three ribs which are angularly arranged in intervals, each of the three ribs being formed as a part of a rectangle and including two right angles, every adjacent two of the three ribs defining a groove therebetween.

Abstract: A tool bit with a surface layer metallurgically bonded on a substrate layer using electrospark deposition (ESD) that allows the tool bit to reduce camout and engage a fastener head for one-handed starting and removal. The surface layer has a rougher finish, compared to conventional tool bits, and therefore better grips engagement surfaces of a mating recess of the fastener during use. The reduction of camout provides greater durability to the tool bit and resists erosion and wear of the engagement surfaces of the fastener.

Abstract: The subject matter described in this specification relates generally to a tool for installing a flexible metal conduit screw-in connector onto a flexible metal conduit and a method for installing the flexible metal conduit connector tool. The flexible metal conduit screw-in connector tool includes a handle, a centering rod, and two studs. The flexible metal conduit connector tool is to engage a flexible metal conduit screw-in connector.

Abstract: A driving head structure of a socket wrench includes an assembling base and a joint portion. The assembling base includes a plurality of convex curved surfaces. The joint portion is disposed on the assembling base. The assembling base is cylinder-shaped, and the joint portion is cuboid-shaped. Each of the convex curved surfaces is contacted with each side of the joint portion.

Abstract: A tool bit includes a drive portion configured to be engaged by a tool, the drive portion including a first maximum outer dimension, a shank extending from the drive portion and including a reduced outer diameter, and a tip coupled to an end of the shank opposite from the drive portion. The tip includes a compressive residual stress layer formed by blasting to increase a wear resistance of the tip relative to the shank. The tip additionally includes a second maximum outer dimension. The reduced outer diameter of the shank is smaller than the first maximum outer dimension of the drive portion and the second maximum outer dimension of the tip.

Abstract: An ultrasonic surgical handpiece comprising a thermal diffuser that includes a thermal conductive layer and an electrical insulating layer. The thermal diffuser reduces hot spots that are objectionable to the user. The handpiece may also comprise an anti-rotation feature which distributes force of the metal horn applied to the polymer housing by increasing applied area under torque.

Abstract: A torque transmission driver has a first end portion adapted to receive and transmit torque from a torque generation source, and a second end portion including a shaped tapered bit having drive surfaces with an alternating series of five or six lobes and troughs about a rotational axis, having a taper angle between 15 and 45° from the rotational axis operable to engage corresponding drive surfaces in a plurality of at least two size fasteners, the tapered drive surfaces of the bit comprising a first tapered portion operable to engage drive surfaces of a first sized fastener and a second tapered portion operable to engage drive surfaces of a second sized fastener, the drive surfaces of the second sized fastener being larger than the drive surfaces of the first sized fastener.

Abstract: A tool system including a handle assembly, a swiveling butt end assembly, a ring assembly, and a tether is disclosed. When using tools at elevated heights there is often accidents involved in which tools drop and possibly injure pedestrians down below. The tool system prevents such events from occurring. The handle assembly importantly includes a swiveling butt end assembly with a ring assembly attached. The ring assembly receives the tether which is attached to a user and to a tool. The tether keeps the tools within reach of the use if there is an accidental dropping. With the swiveling butt end assembly the tether does not tangle or break. The swiveling butt end assembly allows for the handle to freely rotate while tied to the tether. This prohibits tension on the tether to prevent damage to the tether. Also, eliminating the chance of dropping the tool from an elevated height.

Abstract: Screws are provided which have a longitudinal axis and include a threaded shank and a head wherein a socket is formed to be engaged by a wrench and having a pluri-lobed outer profile comprising a series of lobes circumferentially offset and separated by a series of circumferentially offset protrusions of the head. Each protrusion is delimited by two flanks and a front length joining the radially inner ends of the flanks and is convex and symmetrical with respect to a center axis radially oriented with respect to the longitudinal axis. The front length is formed by a center face and two inclined side faces each of which joins the radially inner end of the respective flank with a respective end of the center face, which is oriented orthogonally with respect to the center axis of the protrusion. Pluri-lobed wrenches adapted for use with such screws are also provided.

Abstract: An anti-slip fastener remover tool includes a torque-tool body and a plurality of paired engagement features. The plurality of paired engagement features that grips the lateral surface of the stripped fastener head is radially positioned around a rotation axis of the torque-tool body. The plurality of paired engagement features, wherein each paired engagement feature is offset by 30 degrees, comprises a first engagement feature and a second engagement feature. The first engagement feature and the second engagement feature each comprises a bracing section and a cavity section that are adjacently connected to each other. The cavity section of the first engagement feature is adjacently connected to the cavity section of the second engagement feature. The bracing section of the first engagement feature and the bracing section of the second engagement feature are oppositely positioned of each other about the cavity sections of the first and second engagement features.

Abstract: A surgical system includes a bone fastener having a head and a shaft. The head has a drive interface surface including elliptical edges. A surgical instrument includes an inner drive and an outer sleeve that is engageable with an outer surface of the head to dispose the inner drive and the outer sleeve with the head in a co-axial, capture orientation. The inner drive has a drive interface surface including a plurality of spaced apart lobes. Each lobe has an elliptical edge engageable with one of the elliptical edges of the drive interface surface of the head. Spinal constructs, implants and methods are disclosed.

Abstract: A torque transmission driver has a first end portion adapted to receive and transmit torque from a torque generation source, and a second end portion including a shaped tapered bit having drive surfaces with an alternating series of five or six lobes and troughs about a rotational axis, having a taper angle between 15 and 65° from the rotational axis operable to engage corresponding drive surfaces in a plurality of at least two size fasteners, the tapered drive surfaces of the bit comprising a first tapered portion operable to engage drive surfaces of a first sized fastener and a second tapered portion operable to engage drive surfaces of a second sized fastener, the drive surfaces of the second sized fastener being larger than the drive surfaces of the first sized fastener. The taper angle may be nominally 52° from the rotational axis.

Abstract: A screw bit body which allows for efficient torque force application onto a socket fastener. The screw bit body includes a plurality of laterally-bracing sidewalls, a first base, and a second base. The laterally-bracing sidewalls are radially distributed about a rotation axis of the screw bit body with each further including a first lateral edge, a second lateral edge, a bracing surface, and an engagement cavity. The engagement cavity creates an additional gripping point to prevent slippage in between the screw bit body and the socket fastener. The engagement cavity traverses normal and into the bracing surface. Additionally, the engagement cavity traverses into the screw bit body from the first base to the second base. The engagement cavity is specifically positioned offset from the first lateral edge by a first distance.

Abstract: A polyaxial screwdriver for inserting a bone screw in a vertebra. A polyaxial bone screw assembly includes a coupling element. When a screw engaging end of the polyaxial screwdriver is lowered on the head of the bone screw, the complimentary surfaces of the screw engaging end of the screwdriver and the head of the screw self-align. A ratchet mechanism formed in the screwdriver provides progressive and automatic locking of the polyaxial screwdriver to the coupling element and prevents the accidental unthreading from the coupling element. In another embodiment of the polyaxial screwdriver, a collet slides over the outside surface of the upper end of the coupling element and locks on to the coupling element. In yet another embodiment of a polyaxial screwdriver, the outer sleeve of the polyaxial screwdriver has a split end that securely engages the coupling element.

Abstract: A shearing fastener for sealing a fastener hole in a work piece includes a shank, a plug, and a fastener head. The fastener head is disposed along the upper end of the shank, while the lower end of the shank further includes a transition section that tapers inward and intersects with an upper surface of the plug at a neck. The plug has a threaded outer surface and an outer diameter greater than the shank. The plug engages the threaded bore of the fastener hole when inserted therein. The shank is configured to shear across the neck and separate the shank from the plug when the fastener head is torqued above a threshold torque. The plug is retained within the threaded bore of the fastener hole to seal the lower end of the fastener hole, forming a repaired work piece.

Abstract: A fastener system includes a fastener and a driver, each of which have three alternating lobes and troughs that define the drive surfaces. The three alternating lobes and troughs are each defined by an outer radius portion, a drive side transition, an inner transition radius, and a reverse drive portion. The fastener recess and the driver each also have a side wall defined by the outer transition radius that tapers at a taper angle relative to the rotational axis. The fastener side wall may taper at about 60°. The driver side wall may taper at about 60°. Alternatively, the driver side wall may taper at an angle at least 10° less than the taper angle of the recess side wall, such as 42°. The drive side transition defines a drive angle which may be between 0° and 5°.

Abstract: A tool bit includes a hexagonal drive portion, a working end, and a shank interconnecting the drive portion and the working end. The shank includes an outer peripheral surface having a curvature in a plane including a central axis of the tool bit. The outer peripheral surface having the curvature includes a length in the direction of the central axis. A ratio of the length of the outer peripheral surface having the curvature to the length of the tool bit is between about 0.2:1 and about 0.7:1.

Abstract: A fastener includes a shank having a diameter including a helical thread and a cutting tip. The fastener includes a head having an integral washer and nut. The washer has a diameter (d) and a thickness (t), wherein a relation of the diameter to the thickness is established through a shape factor greater than 0.55, the shape factor for the thickness (t) greater than 0.06 inches being d*(1+2.5t)*t(t-0.06) and for the thickness (t) less than or equal to 0.06 inches being d*(1+2.5t)*t(0.06-t). The fastener may be used in a system wherein a thin steel element abuts the washer and the fastener joins the thin steel element to a thick steel element.

Abstract: A self-aligning and self-engaging drive coupling on a seeding machine planting unit allows for one drive or driven device of the planting unit to be moved between a use position and a service position without the need to manually connect or disconnect the drive coupling between the two devices.

Abstract: A solid, monolithic shaft member has an engagement end. The engagement end has a proximal end a distal end. The proximal end has a first cross-sectional geometry, and the distal end has a second cross-sectional geometry. The first cross-sectional geometry of the proximal end is different from the second cross-sectional geometry of the distal end. The cross-sectional geometry of the distal end transitions to the a cross-sectional geometry of the proximal end along a longitudinal axis of the engagement end of the solid, monolithic shaft member. This transition provides a gradual, blending, continuously transitioning cross-sectional geometry along the entire length of the longitudinal axis of the engagement end of the solid, monolithic shaft member.

Abstract: A tool for holding and applying torque to a nut including a keyway. The tool includes a longitudinal body having a longitudinal axis and a body channel. A longitudinal key is disposed in the body channel with one end of the key configured to engage the keyway of the nut. A first key portion contacts the body channel while a second key portion extends over the body channel forming a gap between the key and the body channel prior to insertion of the key into the keyway of the nut. The second key portion is configured to be resiliently deflected radially inward toward the longitudinal axis of the longitudinal body when the second key portion engages the keyway of the nut.

Abstract: A security fastener, for use with a corresponding key, having a channel in a head of the security fastener for receiving the key, the bottom of the channel being profiled wherein the depth of the channel varies along the length of the channel; a key for use with a security fastener; a combination, or a kit of parts, comprising a security fastener; a method of manufacturing a security fastener; and a method of processing an order for a security fastener.

Abstract: A coupling structure between a screw head and a tightening tool includes a recess (3) with a curved concave surface on the free base of the head (1) of the screw (2) and a protuberance (6) with a curved convex surface finishing the end of the tool (5). The recess has axial projections (4) internally and the protuberance (6) has meridional grooves (7).

Abstract: A design for a rotary drive both for a tool and for a workpiece to be rotationally driven is proposed. This rotary drive design contains a cylindrical basic shape which deviates from a circular cylindrical shape. The contour or the cross section through this basic shape has a plurality of rounded projections and rounded recesses arranged between said projections. The projections tangentially touch a circle having a maximum radius, while the recesses, for their part, tangentially touch a circle having a minimum radius. Deviating from this cylindrical basic shape, in the regions between the projections are configured conical surfaces, which are not instrumental in the transmission of torques, but take care of centering and alignment between the tool and the workpiece.

Abstract: A threaded fastener driving tool includes a proximal end portion, a distal driving head, and a torsion zone extending proximally from the driving head, The distal driving head has a central portion and a plurality of driving surfaces. Each pair of adjacent driving surfaces define a driving space therebetween. The driving surfaces and driving spaces are configured to engage a threaded fastener. The torsion zone includes a plurality of helical grooves bounded by non-cutting surfaces, each helical groove in communication with and extending proximally from at least one of the driving spaces. The helical grooves are configured to untwist and cause lengthening of the torsion zone when an input torque applied to the proximal end portion is insufficient to overcome an output resistance torque at the driving head. The torsion zone may comprise a plurality of twisted wires or cables. A method of manufacturing the driving tool is disclosed.

Abstract: A fastener system including a threaded fastener having a slot formed in the fastener head. Facets are formed in the slot walls, each facet having an angle of less than ninety degrees with respect to the base of the slot such that the slot has a variable width and at least a portion of the width of the base is greater than the width of the opening of the slot. A driver bit includes a blade configured to be inserted into the slot of the fastener. At least a portion of the free end of the blade has an increased width such that the blade is locked within the slot of the fastener when torque is applied to the driver bit.

Abstract: A hand tool includes a shaft, at least one affecting portion, and a protection layer. The shaft is like a bar, and can be hold by a hand. The affecting portion connects with the shaft. The affecting portion can grip a specific part which a user wants to control. The protection layer is settled and/or covered on at least one portion of the hand tool surface. The protection layer is lumpy and rough. Because of the protection layer, the hand tool is shake-proof, wear-proof, slip-resistance, and electric insulation.

Abstract: A threaded fastener driving tool includes a proximal end portion, a distal driving head, and a torsion zone extending proximally from the driving head, The distal driving head has a central portion and a plurality of driving surfaces. Each pair of adjacent driving surfaces define a driving space therebetween. The driving surfaces and driving spaces are configured to engage a threaded fastener. The torsion zone includes a plurality of helical grooves bounded by non-cutting surfaces, each helical groove in communication with and extending proximally from at least one of the driving spaces. The helical grooves are configured to untwist and cause lengthening of the torsion zone when an input torque applied to the proximal end portion is insufficient to overcome an output resistance torque at the driving head. The torsion zone may comprise a plurality of twisted wires or cables. A method of manufacturing the driving tool is disclosed.

Abstract: The present invention discloses a universal anti-torque screwdriver head structure integrally formed and divided into a polygonal insert end and a conical action end, and comprising a plurality of pull-push wings disposed around the action end, a stepped recessed formed between two adjacent pull-push wings and extended inwardly from an open end, and the recess having a longitudinal depth slightly greater than an action hole of a screw of a general specification, and the design of the stepped recess provides high-strength torque and tenacity and fits screws of various different specifications.

Abstract: A Torx headed bit having a Torx shaped head having a first length, a first width and grooves and protrusions, the grooves and protrusions extending along substantially the entire length of the head, the bit further including a shaft having a second length and a second width, the second width being greater that the first width, the shaft being connected to the head via a shoulder which may be sloped to gradually widen the first width to the second width and having grooves and protrusions extending along the shoulder, the shoulder grooves and protrusions substantially continuing from the grooves and protrusions extending along substantially the entirety of the length of the head.

Abstract: A fixing member comprises a threaded end, one end face of which contains a recess capable of housing a tip, complementary in shape, said recess comprising a peripheral edge in the form of a multilobed continuous curved line. The cross-section of each lobe L is defined by a continuous series of three arcs of a circle, i.e. a first convex arc of a circle with a first radius (R1), on either side of which a second concave arc of a circle with a second radius (R2) are positioned. Each lobe is connected to the adjacent lobe via a third convex arc of a circle with a third radius (R3, R3u) larger than the first radius (R1). The invention also relates to a male element with a raised shape complementing that of the recess, in addition to a handling tool and a testing gauge comprising such a male element.

Abstract: Disclosed is a screw head having a slot (2) in the upper surface of the screw head, an upper peripheral wall (9) of hexalobular planform extending down into the screw head, the upper peripheral wall (9) being parallel or near parallel to the axis of the screw, a sloping transition surface (15) extending downwardly and inwardly with respect to the lower edge of the upper peripheral wall (9), and a tapered recess (11) extending downwardly from the lower edge of the sloping transition surface (15), in which the dimensions of the screw head are such that when the screw head is engaged by a tool (6) having upper (16) and lower engagement (17) sections, there is a ‘stick fit’ between the surface of the tapered recess (11) and the external surface of the lower engagement section (17), and there is no engagement with the sloping transition surface (15).

Abstract: The invention provides a screw in which the screw head (1) has a slot (2) in the upper surface of the screw head, an upper peripheral wall (9) of regular planform extending down from the rim of the slot into the screwhead, the upper peripheral wall (9) being generally aligned with the axis of the screw to form a recess (3), a sloping transition surface (15), extending downwardly and inwardly with respect to the lower edge of the upper peripheral wall (9), and a further recess (11) extending downwardly from the lower edge of the sloping transition surface (15), in which the dimensions of the screw head are such that when the screwhead is engaged by a tool (6) having upper (16) and lower (17) engagement sections, and in which the upper engagement section (16) extends downwardly with respect to the axis of the screw to which the tool is to engage and the lower engagement section (17) extends further downwardly, and in which there is at least one protrusion (or rib) (21) on the inside wall (12) of the further rec

Abstract: A tool handle includes a handle body having a first end, a second end, an exterior surface and a bore configured to receive a shaft. A wire stripper is integrated into the exterior surface of the handle and configured to cut and remove the insulating layer of a conductive wire. The wire stripper includes a first sharp edge and a second sharp edge intersecting the first sharp edge to form a v-shaped notch.

Abstract: Various embodiments described herein provide a fastener system having straight walled driving surfaces that provides a reliable stick fit feature, while also improving stability of engagement between the system components. A feature of the new system is to allow engagement of existing standard straight walled drivers in the new system.

Abstract: A screwdriver bit is revealed. The screwdriver bit includes a driving portion, a narrow neck portion integrated with and extended from the driving portion, and a working segment integrated with and extended from the narrow neck portion. The narrow neck portion consists of a connection portion, a first tapered transition, and a second tapered transition. The first tapered transition is an arc taper and the second tapered transition is a straight taper. When the screwdriver bit is driven by a power tool and is rotated at high speed, the torsional stress generated is dispersed by the first tapered transition while the second tapered transition is used to reduce torsional stress of the narrow neck portion. Thus the wearing of the screwdriver bit is effectively reduced.

Abstract: A hand tool includes a shaft, at least one affecting portion, and a protection layer. The shaft is like a bar, and can be hold by a hand. The affecting portion connects with the shaft. The affecting portion can grip a specific part which a user wants to control. The protection layer is settled and/or covered on at least one portion of the hand tool surface. The protection layer is lumpy and rough. Because of the protection layer, the hand tool is shake-proof, wear-proof, slip-resistance, and electric insulation.

Abstract: A star-type wrench includes a shank, a first operation portion mounted on a first end of the shank, and a second operation portion mounted on a second end of the shank. The shank is formed integrally to have a star-shaped outer diameter. Thus, the shank has a star-shaped outer diameter so that when the first operation portion or the second operation portion is broken, the first operation portion or the second operation portion can be removed from the shank, and the shank can function as an auxiliary operation portion and can be reused and operated successively.

Abstract: A drive design for a fastening element in-stalled using screws, in particular, a screw or a nut, comprises drive surfaces (13) disposed at least approximately in radial planes and transition surfaces (15) disposed between said drive surfaces. In one embodiment of the outside of the surfaces, the surfaces form a saw shape, In this way, when rotation is in one direction in which a tool en-gages with the drive surfaces (13), torque-application results, whereas in the opposite rotational direction a force component is produced that acts on the tool without engaging with the screw drive design. A tool is designed to be complementary to the screw drive design. The screw drive design can be an inner shaping as well an outer shaping. The same applies for a nut. This drive design is intended for designing a screw connector in such a way that it can be tightened once, but cannot be loosened any longer.

Abstract: A tool incorporating a multi-function tool tip on an elongated shaft is disclosed for adjusting and maintaining different irrigation-related products of one or more manufacturers, having a handle configured at one shaft-end, and formed at an opposite shaft-end a multi-function tool-tip with a screw adjustment member located between two outwardly-extended generally planar members. In one tool function mode leading-edge portions of the planar members are sized and shaped to align and rotate within a conical recess of a first irrigation-related product and facilitate engagement of the screw adjustment member with an upper end of an adjustment screw centered within the conical recess. In other functional modes, the planar members are sized and shaped for insertion through an adjustment port of a spring-loaded slidably-positionable member of a second irrigation-related product to pull the member outward to a desired degree and/or make water emitting adjustments interiorly within the product.

Abstract: A screw tightening structure includes an indented concave recess formed on a screw, and mating convex sections provided on a screw tightening tool for tightening the screw: the recess and the mating convex sections including three or more torque transfer portions, respectively, which protrude outward and are disposed at equiangular intervals for concentrically mating engagements; rotating the screw tightening tool causing the torque transfer portions of the mating convex sections to transfer a tightening torque to the screw via the torque transfer portions of the recess; under which outer circumferential edge portions of the torque transfer portions of the mating convex sections to be brought into abutting contact with sidewall of the torque transfer portions of the recess with the tightening torque being transferred to the screw via force application points Q representing resulting abutment portions.

Abstract: A screwdriver bit has a shank, a connecting portion, a necking portion defined between the shank and the connecting portion, a head disposed on a distal end of the connecting portion, multiple ribs separately arranged around the connecting portion and the necking portion and multiple shear grooves respectively defined between the connecting portion and the necking portion and each shear groove is defined between two adjacent ribs. When a torsion force is applied to the screwdriver bit, a shear force formed between the necking portion and the connecting portion is concentrated on points where the ribs and the shear grooves connect with each other in a dot-like form. Therefore, the screwdriver bit has strengthened shear strength and prolonged life for use.

Abstract: A screw tightening structure includes an indented concave recess formed on a screw, and mating convex sections provided on a screw tightening tool for tightening the screw: the recess and the mating convex sections including three or more torque transfer portions, respectively, which protrude outward and are disposed at equiangular intervals for concentrically mating engagements; rotating the screw tightening tool causing the torque transfer portions of the mating convex sections to transfer a tightening torque to the screw via the torque transfer portions of the recess; under which outer circumferential edge portions of the torque transfer portions of the mating convex sections to be brought into abutting contact with sidewall of the torque transfer portions of the recess with the tightening torque being transferred to the screw via force application points Q representing resulting abutment portions.

Abstract: The invention provides for an improved screw and screwdriver. The self-locking screw and screwdriver, the JacLock™ Screw and JacLock™ Screwdriver, is designed to improve insertion and/or removal of a screw. The new screw head differs from normal horizontal cut/slotted screw heads and cross cut/slotted screw heads. The invention calls for a standard vertical cut/slot in the screw head along with two cross cuts/slots in the head of the screw equi-distant from the center of the horizontal standard slot. The screwdriver has a redesigned head that will fit into the three cuts/slots in the new screw. Once the screwdriver is inserted into the screw head it will lock in place making it easier to insert or remove the screw. The design results in improved torque and eliminates the possibility of the screwdriver slipping off the head of the screw and possibly damaging the head of the screw.

Abstract: Various embodiments described herein provide a fastener system having straight walled driving surfaces that provides a reliable stick fit feature, while also improving stability of engagement between the system components. A feature of the new system is to allow engagement of existing standard straight walled drivers in the new system.

Abstract: A pivotal wrench includes a handle having a first pivot portion provided with first positioning holes, a tool head having a second pivot portion provided with second positioning holes, a connector pivotally connected between the handle and the tool head, two positioning members each mounted in the connector and each positioned in one of the first positioning holes and one of the second positioning holes, and an elastic member mounted in the connector and biased between the positioning members. Thus, the handle is pivoted relative to the connector, and the tool head is pivoted relative to the connector, so that the working angles of the handle and the tool head can be adjusted freely, and the pivotal wrench is available for a limited or narrow working place.