Abstract: A dental implant installation method and device for picking up a prosthetic support implant, transporting it to an osteotomy site, then transmitting rotational force from a drill to the implant to thread the implant into bone tissue at the osteotomy site. The device includes an alignment section that aligns and rotationally engages the device in a socket of a threaded implant. An aft end of the device is configured to releasably engage a drill and to transmit turning forces from such drill to the device. A retainer supported on the shaft adjacent the alignment section releasably engages and retains the implant against axial disengagement once the alignment section has been inserted into the socket.

Abstract: A tool handle having a core (2) adapted to be secured to a screwdriver blade (1), and a sleeve (3) of plastics material placed around the core. The core and the sleeve have portions in relief (9, 20) for mutual positioning in rotation, and mutual positioning devices (5, 10, 11, 14, 17, 21, 22) for mutual positioning in axial translation. The sleeve (3) is a part that is distinct from the core, and is made of a semi-rigid plastics material and is engaged on the core (2) from in front.

Abstract: A screwdriver structure includes a handle having a projecting section at rear end, a circumference of the projecting section being formed with a predetermined number of holes extending into the interior of the projecting section; a stem disposed at front end of the handle; and a rotary cap having a cavity inward extending from a bottom end of the rotary cap, an outer circumference of the rotary cap being formed with several through holes communicating with the cavity. The rotary cap is rotatably disposed on the projecting section which is accommodated in the cavity with the through holes. When operating the screwdriver, the palm of a user's hand can attach to the rotary cap. When turning the rotary cap, at least one through holes is align with at least one holes. A rod can be inserted through the hole and the through hole to elongate the application force arm.

Abstract: The present invention provides a screw, comprising a screw head having a drive recess and a screw shank having threads and being integrally formed with the screw head, wherein the drive recess includes a plurality of engaging grooves equiangularly radiating from an axis of the screw in plan view, a bottom face of each engaging groove having a steep slope, which is near to the screw shank, and a gentle slope, which is far from the screw shank, for enlarging the engaging area of the engaging grooves.

Abstract: A method and apparatus for removing a fastener from an assembly in which the fastener is aligned with a concave end of the apparatus. A socket bit holder has a first end and a second end, with the first end being a concave end, and having a socket bit receptacle. The second end has a socket drive receptacle.

Abstract: Disclosed is an insulated magnetic screwdriver, including a shank having a tip at an end or each end thereof and a peripheral groove formed around a central portion thereof so that the central portion of the shank has a diameter smaller than that of each end thereof, a handle having a locking recess into which the shank is fitted and fixedly or detachably locked thereto, an insulator mounted rotatably around the peripheral groove of the shank while having the same circumference to the shank; and a cylindrical magnet mounted around the peripheral groove of the shank to have the same circumference to the shank while being positioned at an end or each end of the insulator to magnetize the tip. Practically, a current-charged screw in a deep narrow hole can be easily loosened or firmly tightened by means of the inventive screwdriver, without the risk to electric shock.

Abstract: A slide stop device of a hexagonal spanner serves for preventing a rounded edged inner hexagonal screw to slide as the hexagonal spanner drives the inner hexagonal screw. The slide stop device comprises a spanner body; one end of the spanner body having a driving portion; the driving portion having an axial slot extending through a center of one end surface of the driving portion to a lateral side thereof; a screw hole to be normal to one inner surface of the slot; a screwing resisting element having a shape matching the shape of the screw hole; the screwing resisting element serves for enforcing the driving portion to deform. In use, the screwing resisting element is inserted into the screw hole. When the screwing resisting element is inserted to push one surface of the slot, the slot will be expanded so as to expand the driving portion.

Abstract: A key for operating a security fastener having a lock pattern includes a retractable key pattern. The key pattern has an operational extension position in which the key pattern is enabled for substantial engagement with a security fastener having a matching lock pattern, thereby allowing operation of the matching security fastener. The key pattern is also capable of retreating a non-operational retraction position in which the key pattern is not capable of substantial engagement with a security fastener having a non-matching lock pattern, thereby preventing operation of the non-matching security fastener.

Abstract: Disclosed herein is a kit comprising a tool element and a screw for mating engagement therewith. The tool element is preferably a portion of a screwdriver, ratchet or power tool and preferably comprises blade means, flared drive means and substantially rectangular shank drive means. The screw preferably comprises a head and a body and the head of the screw preferably comprises a slot and a substantially rectangular shank set. In preferred embodiments of the kit, the flared drive means of the tool element is preferably sized to engage the slot of the screw and the substantially rectangular shank drive means of the tool element is preferably sized to engage the substantially rectangular shank set of the screw. Additional embodiments of the invention are disclosed herein.

Abstract: A friction stir rivet is rotated and driven through a first fusible workpiece into an engaged second fusible workpiece, causing local portions of the first and second workpieces to plasticize. A slideable cap contacts the exposed surface of the first workpiece shortly after the process begins. The contact causes the cap to act as a retaining element, limiting the escape of plasticized material from stir site. Once the rivet is driven into the first and second workpieces, rotation ceases and the plasticized material hardens around the rivet. A weld is thus created, joining the workpieces and encompassing the rivet, which provides additional mechanical strength.

Abstract: Hand tool handle with rotary cap, including: a handle having a seat section at rear end; a rotary cap having a cavity and rotatably disposed on the seat section with the seat section accommodated in the cavity; and at least one projection having a cross-sectional area smaller than that of the rotary cap or the rear end of the handle. The projection is positioned between top wall of the cavity and an end face of the seat section. The top wall of the cavity via the projection contacts with the end face of the seat section. When the rotary cap rotates on the handle, the projection serves as a support point for the rotary cap so as to facilitate rotation of the rotary cap.

Abstract: A sure grip screwdriver system comprises a shaft. The shaft has a handle end and a working end. The shaft has a working inner portion and a working outer portion. The working inner portion is adjacent to the handle end. The working outer portion is adjacent to the working end. The working outer portion further has a generally cube-shaped configuration of a first smaller size. The working inner portion further has a generally cube-shaped configuration of a second larger size. Last provided is a shaft support. The shaft support has a recess at one end to receive the handle end of the shaft.

Abstract: There is described and claimed herein a noback bolt design which comprises an elongated shaft having two opposing ends. The first end has an enlarged conical bolt head that extends from this shaft. On the opposite shaft end is a terminus or tip. Between the tip and the conical head, the shaft bears an externally threaded segment on at least a portion of the shaft. The precise length of this segment is determined upon intended applications of my bolt, and the type or exact number of structural components to be assembled. These components include panels, brackets, planar surfaces, chassises, and like structures.

Abstract: An asymmetrical wrench and fastener system comprising radially extending splines having opposing surfaces whose inner ends are inclined by different amounts with respect to a radius intersecting the respective inner ends to alter the torque between the tightening and loosening directions. This configuration makes it either easier or harder to loosen the fastener than it was to tighten it, depending on the amount the opposing surfaces of the splines are inclined.

Abstract: A screw has a head releasably engaged by a flat blade tip in such a manner so as to prevent the flat blade tip from sliding off of the head of the screw as the flat blade up tip drives the screw. The head of the screw has a blind slot defined by a pair of walls and which extends diametrically and completely thereacross, and a blind bore extending concentrically therein. The diameter of the blind bore is less than the width of the blind slot preventing damage to, or breakage of, a drill bit used to drill the blind bore during manufacture by preventing the drill bit from hitting the pair of walls during drilling. The flat blade tip has a projection depending centrally therefrom that is coplanar with, and is a continuation of, the flat blade tip so as to allow the projection to be readily formed by merely removing material from the flat blade tip.

Abstract: A combination of a screw and a screw driver bit and a header punch for its manufacture capable of effectively preventing a come-out phenomenon of the screw driver bit by improving the structure of a groove part in a cross groove part in a cross groove of a screw to prevent a conventional damage.

Abstract: A process for profiling a workpiece engagement surface of a band tool, and a hand tool produced thereby, in particular a screwing tool, such as a screwdriver or wrench, pliers, a clamping tool or a file, comprising the steps of briefly irradiating the workpiece engagement surface (8) over a large area and/or locally with a high level of energy, such that a region of an irradiated zone which is close to the surface melts and solidifies suddenly at an edge to form a rib.

Abstract: A device for use in a torque transmitting system including a driver having a specially configured driver end and a fastener having a specially configured recess for receiving the end of the driver, wherein the respective externally configured and internally configured components include a body having an axis in which the body has an outer polygonal cross section defined by a perimeter wall, an inner polygonal central portion positioned within the perimeter wall and having an area less than the area of the outer polygonal cross section; a drive wall which forms a portion of the perimeter wall and extends on a plane from a proximal end outwardly from the polygonal central portion to a distal end; a first outer wall forming another portion of the perimeter wall has a proximal end joining the distal end of the drive wall at an angle which may be less than 90° and a distal end terminating on the perimeter wall.

Abstract: A novel drive bit for mounting in a sleeve of a rotary driving tool for driving a slottedd screw having a hollow cap with a threaded interior cylindrical wall having an inner minor diameter comprises a driver portion at one end thereof and a sleeve engaging portion at the other end thereof, wherein the driver portion includes a generally cylindrical aligning portion with a predetermined diameter of between about 85% and about 99½% of the inner minor diameter and a pair of laterally opposed concave surfaces tapering at a predetermined radius of curvature of between about 50% and about 150% of the inner minor diameter to a generally rectangular flat headed tip for engaging the slot of the screw while the generally cylindrical aligning portion aligns the cap and the screw substantially coaxially with the bit.

Abstract: A socket for manipulating a conduit lock nut comprises a wall enclosing a circular area equal to an outer diameter of a lock nut terminates in a lip. A plurality of teeth spaced at a predetermined distance engage lugs of a lock nut. The teeth have sufficient height to engage the lugs when force is applied to the socket. A centering stem within the wall coacts with an inner wall of an electrical conduit opening to axially align the teeth with lugs of a lock nut about the opening. A tapered lead in provides spatial relief for initial engagement of the stem with an inner wall of an opening. A well between the stem and the teeth provide a recess for protruding walls of an electrical conduit opening to reside in during engagement of the teeth with lugs of a lock nut about the opening.

Abstract: A chuck device includes a body having a slot in a first end thereof and a hole is defined radially in the body and communicates with the slot. A spring is mounted to the body and is biased between a stepped shoulder on the body and a movable clamp connected to the body. A connection rod is connected to a second end of the body. A positioning pin is movably inserted in the hole and an end of the positioning pin extends from the hole and has a tapered periphery. A sleeve is slidably mounted to the body and has a first tapered inner periphery for being matched with the tapered periphery of the positioning pin. A second tapered inner periphery is defined in a second end of the sleeve so as to push the movable clamp when sliding the sleeve by compressing the spring.

Abstract: Threaded fasteners that are tightly seated can be removed or installed easily using a tool constructed following the precepts of the present invention. The tool includes a pivot that can be releasably secured to any fixed object close to the fastener to be removed. A lever is pivotably connected to the pivot at its far end, and its near end has a handle for pressing downward on the lever. The drive assembly Is slidable along the length of the lever and can be aligned with the screw or fastener to be turned. The drive assembly includes a bit to engage the fastener, and the lever is used to press the bit tightly into the head of the screw. The drive assembly is rotatable, and maybe turned by a conventional tool such as a socket wrench or a box wrench. In this way, screws which are awkwardly located or are part of equipment that would be damaged by a slipping bit can be readily installed or removed.

Abstract: A method for assembling or disassembling cutting inserts mounted in a rotary cutting tool assembly (20). The cutting tool assembly comprises a plurality of coaxially mounted cutters (22) on a common shaft (24) having an axis of rotation (A). The cutters have insert receiving pockets (30) having threaded bores (38) substantially parallel to the axis of rotation (A). Each of the insert receiving pockets has a cutting insert (28) having a through bore that is substantially parallel to the axis of rotation (A). Each of the cutting inserts is secured by means of a clamping screw (36). Each clamping screw is tightened with a key (42), the key having a head portion (44) engaging the clamping screw and a holding portion (46) transversely directed to the axis (B) of the head portion.

Abstract: A device in the form of a quarter-turn device for attaching together structural element. The device has an attachment element passing through a hole in a first structural element, such as a cover, with a shank, a head and a part profiled so as to engage with a retaining element arranged on the structural element. The head, which may be circular, with a curved upper face, has a diametrical slot having a longitudinal profile with a bottom curved in a circular arc, the center of which is located at some distance above the head. The longitudinal ends of the slot open out from the upper face of the head at two points offset radially inwards with respect to the periphery or circumference of the head.

Abstract: A security fastener removing kit for removing security fasteners designed for only turning in a clockwise or tightening direction. The security fastener removing kit includes boring at least one hole in a head of a security fastener. A tool member is provided that has at least one tine that is removably insertable in the hole in the head of the security fastener. The tool member permits a user to rotate the head of the security fastener in at least a counterclockwise direction thereby unfastening the security fastener.

Abstract: A tool for receiving adapters and sockets of various sizes. One embodiment includes a first receiving end having outer and inner cavities being substantially rectangular with the inner cavity having a smaller diameter than the outer cavity. A second extension end is positioned opposite the first receiving end and includes outer and inner extensions being substantially rectangular shaped with the outer extension having a smaller width than the inner extension. Another embodiment includes a first end having at least two receiving cavities axially aligned. A first receiving cavity is positioned proximate the first end and has a larger diameter than a second distal receiving cavity. A second end includes at least two receiving cavities axially aligned including a third receiving cavity positioned proximate the second end having a larger diameter than a fourth distal receiving cavity.

Abstract: A high torque wrenching system having a wrench with asymmetrical torque transmission capability. The wrench includes a plurality of protuberances and a plurality of recesses around a central axis. The fastener also includes a plurality of protuberances and recesses around the central axis for mating with the wrench. The protuberances and recesses form a saw tooth shape. Each tooth or protuberance is formed by a first wrenching surface for loosening the fastener and a second wrenching surface for tightening the fastener. The wrenching surface carrying the loosening load is at a much smaller angle with respect to a radial vector extending from the wrench's central axis than the wrenching surface carrying the tightening load. The result is that the loosening torque vector will have a much greater moment arm.

Abstract: Disclosed is an asymmetrical fastening system comprising (1) a fastener having asymmetrical loosening surfaces and tightening surfaces formed in a single fastening periphery, and (2) a wrench comprising asymmetrical loosening surfaces and tightening surfaces formed in a single fastening periphery, that engage, respectively, the loosening surfaces and tightening surfaces of the fastener. When the wrench engages the fastener and force is applied to the wrench the torque to failure of the system in the loosening direction is greater than the torque to failure in the tightening direction.

Abstract: A high torque wrenching system is provided having a wrench with asymmetrical torque transmission capability. The wrench includes a plurality of protuberances and a plurality of recesses around a central axis. The fastener also includes a plurality of protuberances and recesses around the central axis for mating with the wrench. The protuberances and recesses form a saw tooth shape. Each tooth or protuberance is formed by a first wrenching surface for loosening the fastener and a second wrenching surface for tightening the fastener. The wrenching surface carrying the loosening load will be at a much smaller angle, with respect to a radial vector extending from the wrench's central axis, than the wrenching surface carrying the tightening load. The result is that the loosening torque vector will have a much greater moment arm.

Abstract: A hex wrench includes a head with notches defined in an outer periphery thereof and the notches are located to face the inside of the object. The inside of the object is deformed during being rotated by the head and engaged with the notches so as to increase the feature of anti-slippery between the head of the wrench and the object.

Abstract: A tool adapted to releasably retain a fastener. The tool includes a driving portion having a plurality of tool surfaces adapted to form an interface with a fastener. At least one fastener engaging member is attached to the driving portion that extends above one or more of the tool surfaces. The fastener engaging member is adapted to form an interface with at least one surface on the fastener such that the fastener can be releasably retained to the driving portion.

Abstract: A tool adapted to releasably retain a fastener. The tool includes a driving portion having a plurality of tool surfaces adapted to form an interface with a fastener. At least one fastener engaging member is attached to the driving portion that extends above one or more of the tool surfaces. The fastener engaging member forms an interface with at least one surface on the fastener such that the fastener is releasably retained to the driving portion.

Abstract: At least one of two components (1, 3) of a coupling includes a profile with four splines (5) having more or less radial edges (11). Four straight-line segments (6) on the inside of the profile are joined with the splines. The four straight-line segments (6) are designed to circumscribe a standardized square drive (14). This profile can be used for driving sockets and accessories for screwing and unscrewing.

Abstract: An apparatus for removing helical thread inserts having a removal notch formed along a female thread surface. The apparatus can selectively extract helical thread inserts by selectively engaging the removal notch and actuating the end of the insert radially inward to prevent the end of the insert from engaging threads of the bore which it is disposed in. The apparatus includes a handle, a head attached to the handle, and a manually operable key. The head includes a bore formed therethrough having a central axis offset from central axis of the head, whereby the key is rotatably supported in the bore and includes an engaging lip for selectively engaging the removal notch of the insert and allowing for easier removal of the insert.

Abstract: A new and improved hand tool device for use in the operation of quarter turn spring loaded self-ejecting or non spring loaded button type fasteners. A device that minimizes damage to costly painted, finished or non finished surface panel or parts due to it's radii and precise fit in the concave groove found in the head of quarter turn fasteners. Comprising of a blade design with specific radii and thickness to fit precisely in the concave grove found in quarter turn spring loaded self-ejecting or non spring loaded button type fasteners.

Abstract: The invention relates to a hand tool, in particular in the form of a screwdriver or a file, comprising one or more working surfaces with a grooved profile. According to the invention, the grooves are formed by recesses which are created using high-energy irradiation and which have border ribs. The border ribs can be formed by the edges of a fusion which immediately solidifies into a dish-shaped structure.

Abstract: A screwdriver is equipped with a removable ring tab on which words or diagrams are provided. The screwdriver has a handle portion and a shank portion and on the handle portion is disposed a recessed groove in which the ring tab of a like or different color can be housed. The ends of the ring tab are provided with a retaining protrusion and a retaining cavity respectively for locking the ring tab in place. Words or diagrams of different sized can be printed or punched on the ring tab instead of on the handle portion whereby even mistakenly printed or punched words or diagrams can be easily removed by replacement of the ring tabs without discarding the whole screwdrivers in mass production. Besides, the printed or punched words or diagrams are not easily abraded away in long term operation.

Abstract: A device includes a body having a plurality of alternating drive regions and corner regions arranged about a central axis for cooperation to define a socket recess having an open outer end and an inner end. Each drive region has a drive surface disposed thereon and confined thereto. At least one drive surface slopes toward the central axis in a first direction generally parallel to the central axis and in a second direction generally traverse to the central axis. The device may be a rotatably driveable device for driving fasteners and the like, wherein the axis is the axis of rotation. The device can be used for retaining and driving a drive member. In one form, a drive member, comprising alternating flats and corners is inserted into the device. The flats of the drive member frictionally engage with at least two of the drive regions, thereby releaseably retaining the drive member in the body. The drive member can be rotated by rotating the body in one of the clockwise and counter-clockwise directions.

Abstract: The invention refers to the screwdriver shank with a detachable attachment that allows for easier tightening and loosening by application of a spanner. The shank (1) of the screwdriver with a detachable attachment (2), referred to in this invention is on one end flat (1a), provided for mounting of the detachable attachment (2), that is externally angular and whereof the opening (2a) is of such shape that conforms to the shape of the part (1a) of the shank (1) and that the detachable attachment (2) fits to the contact of the shank (1) and of the flat part (1a).

Abstract: A device for use in a torque transmitting system including a driver having a specially configured driver end and a fastener having a specially configured recess for receiving the end of the driver, wherein the respective externally configured and internally configured components include a body having an axis in which the body has an outer polygonal cross section defined by a perimeter wall, an inner polygonal central portion positioned within the perimeter wall and having an area less than the area of the outer polygonal cross section; a drive wall which forms a portion of the perimeter wall and extends on a plane from a proximal end outwardly from the polygonal central portion to a distal end; a first outer wall forming another portion of the perimeter wall has a proximal end joining the distal end of the drive wall at an angle which may be less than 90° and a distal end terminating on the perimeter wall.

Abstract: Fastener (1) having a driving head (2) which includes at least two superimposed non-circular recesses (3, 4, 5) for receiving the bit of a driver (7) with which driver a torque can be applied to operate the fastener (1), characterised in that the fastener (1) comprises a security feature whereby said torque needs to the applied to at least two of said recesses (3, 4, 5) in order to operate the fastener (1).

Abstract: An apparatus for removing helical thread inserts having a removal notch formed along the female thread surface. The apparatus can selectively extract helical thread inserts by selectively engaging the removal notch and actuating the end of the insert radially inward to prevent the end of the insert from engaging threads of the bore which it is disposed in. The apparatus includes a handle, a head attached to the handle and a manually operable key. The head includes a hole formed in an offset location. A key having an engaging lip on the end is disposed in the hole and acting along a eccentric pattern to selectively engage the removal notch of the insert and allow for easier removal of the insert.

Abstract: The invention relates to a screwdriver or screwdriver attachment (S) comprising one input and one output end (1 and 2) and a shank (4) located in between the two. The output end has at least three, preferably four, ribs (7) which radiate outwards from a central section (8) located around the axis of rotation (x—x). The ribs (7) on each end side have a face, which is placed at an angle to the axis of rotation, and flanks on the front and back side (13, 14) which run substantially parallel to each other in the area next to the frontal face (11). In this area the flank (13) on the front side is located on a diametrical surface (diameter D—D) in relation to the axis of rotation (x—x), whereby the flanks (13, 14) of adjoining ribs (7) form a groove (9) which runs lengthways and whose root (16) ends in the outer surface of a section of the shank.

Abstract: A device in the form of a quarter-turn device for attaching together structural element. The device has an attachment element passing through a hole in a first structural element, such as a cover, with a shank, a head and a part profiled so as to engage with a retaining element arranged on the structural element. The head, which may be circular, with a curved upper face, has a diametrical slot having a longitudinal profile with a bottom curved in a circular arc, the center of which is located at some distance above the head. The longitudinal ends of the slot open out from the upper face of the head at two points offset radially inwards with respect to the periphery or circumference of the head.

Abstract: A set of driver bits for Robertson screw fasteners includes driver bits (10a-d) whose shaft bodies (12a-d) have distinctive markings thereon corresponding to respective sizes of working tips (14a-d) of the driver bits. These distinctive markings are consistent throughout a family of sets. In one embodiment the distinctive marking are different colors, with each different color corresponding to a working-tip size. The colors are applied only to shaft bodies (36a-d) of some of the driver bits by plating the shaft bodies with zinc layers (22) and then dying the outer surfaces of the zinc layers with color dye (24). This coloring is carried out before the shaft bodies are connected to their respective working tips. Once the outer surfaces (20) of the shaft bodies are thusly colored, the respective working tips are swaged to the shaft bodies to thereby form color-coded Robertson driver bits.

Abstract: A steering column wrench includes a body having a first eccentric passage for receiving a head of a steering column therein, and a second eccentric passage. A communication hole communicates between the first eccentric passage and the second eccentric passage. The first passage has a knurled inner periphery. A driving member is received in the second eccentric passage and includes an engaging section and a rod which extends eccentrically from an end of the engaging section with which a ratchet tool is connected. The rod has a knurled surface and contacts the head via the communication hole so that when rotating the engaging section, the head clamped between the rod and the first eccentric passage is easily loosened.

Abstract: A tool for installing a first end of a bent tubular shower arm into a female threaded receiver is disclosed. The tool comprises a shaft having a diameter sized to fit within the shower arm through a second end thereof. The shaft is preferably bent at an angle which is generally complimentary to the angle of the bend in the shower arm. A first end of the shaft is shaped to engage the interior of the shower arm proximate the bend therein to prevent the tool from rotating relative to the shower arm. A second end of the shaft includes a fork having a pair of prongs separated by a gap sized and shaped to accept a stub out of water supply line extending outwardly from a wall. The prongs are used to push a compression fit adapter along the stub out and into an installed position adjacent the wall.

Abstract: A drill bit has a chuck engaging shank portion having a geometric cross-sectional shape; a plurality of projections formed on at least a part of at least one of said surfaces; said projections (a) varying in height across said surface, and (b) engaging an inner surface of a chuck to prevent slippage of said bit in said chuck.

Abstract: A cross-point shaped screwdriver has a cylindrical metal shaft with an axis coaxial with an insertion direction for driving a screw having a socket. A bit section, formed on the end of the shaft, has four blades. A circumferential groove is formed in the exterior of each of the blades. The grooves are in a single plane extending across a width of each plane. When the screwdriver engages the screw socket, the grooves substantially align with a top portion of the socket. The grooves provide a clearance between the bit section and upper end of the socket top, thereby reducing wear on the screw socket and permit the driver to engage and drive the screw at a depth that the standard driver can not engage and drive upon. Often the screw is rounded out by a standard driver.

Abstract: An adapter for adapting a right-angle wrench, such as an Allen wrench, to a socket wrench or ratchet handle is disclosed. The adapter comprises an upper adapter housing, a lower adapter housing which receives the upper adapter housing, and an insert portion insertable in the lower adapter housing. The upper adapter housing has a rectangular recessed socket opening at a top end and a lower externally threaded portion toward a bottom end. The lower externally threaded portion defines a transverse channel with an upper bearing surface for accommodating handle portions of the right-angle wrenches. The upper bearing surface may be configured with an angular taper. The lower adapter housing has an axial hole at a bottom end and an externally threaded portion towards a top end which receives the lower externally threaded portion. Right-angle wrenches are snugly accommodated in the axial hole of the lower adapter housing by the insert portion.