Abstract: A dual headed tool having a rotatable arm has a shank with a tool head at each end. The shank slides through a rotatable hub positioned at the distal ends of the tools handle. One half of the shank is inserted into a longitudinal bore extending through the handle while the other half of the shank extends outward so that the tool head at its end may be used. The shank may be slid out of the bore within the handle and rotated to alternate which end of the shank is used. The tour may also be configured without the shank extending into the longitudinal bore in the handle, such that the handle extends away from the shank at an angle between 0° and 180°.

Abstract: A folding flex ratchet having a handle that is joined to a ratchet head by an offset hinge that allows the handle to be selectively folded between an extended position for applying greater torque and a folded position in which the ratchet operates in spaces where access is minimal, somewhat like a palm ratchet. The ratchet head may include a generally L-shaped neck that provides an offset handle connection point that is offset in two directions from the ratchet head, both rearwardly and longitudinally. The handle, ratchet head and offset hinge are configured so that, when in the folded position, the handle is approximately centered over the ratchet head and the handle extends substantially parallel to the ratchet head.

Abstract: A drop nipple wrench assembly can tighten and/or loosen a drop nipple of a fire sprinkler system. A drive handle of the wrench assembly can be folded along a guide shaft for storage. The drive handle can be extended generally perpendicular to the guide shaft to provide leverage for loosening and/or tightening the drop nipple.

Abstract: The presently disclosed subject matter is directed a hand-held wrench device that is advantageously sized and shaped to be used in confined locations (e.g., in the space immediately below a sink or behind a toilet). Particularly, the disclosed wrench device comprises a base portion and a body portion positioned aligned therewith. The body portion includes at least one cavity sized and/or shaped to accommodate at least a portion of the wing extension of a wing nut. In use, once the disclosed device is coupled to a nut, the nut can be tightened or loosened simply by rotating the device by hand about its own axis in a clockwise or counterclockwise direction.

Abstract: Methods and Apparatuses related to an ergonomic handle are disclosed. An example apparatus for supporting an elongate tool having a barrel may include an ergonomic handle housing. At least a portion of an exterior profile of the ergonomic handle housing includes one or more depressions spatially arranged in series along the portion of the exterior profile of the ergonomic handle housing. The apparatus may also include an attachment device coupled to the ergonomic handle housing and configured to couple the barrel of the elongate tool to the ergonomic handle housing.

Abstract: A basin wrench is described having a telescoping assembly, pivotal jaws, a light, and a removable T-bar assembly. The wrench includes a polymeric housing having a contoured gripping region. The T-bar assembly includes a pivotally mounted hub and bar slidably retained within the hub. The T-bar assembly can be placed in a stowed position in which the bar is positioned alongside the housing. The wrench also includes magnetic retaining provisions to retain the T-bar assembly in its stowed position.

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 transmission device for transmitting a force and a torque between a handling device and a tool of a medical instrument includes transmission members interconnected in a hinged manner. A convex coupling portion of a first transmission member is in each case held interlockingly in a concave coupling portion of an adjacent second transmission member in such a way that a rotation of the first transmission member about its longitudinal axis causes a rotation of the second transmission member about its longitudinal axis. A convex coupling portion of a first transmission member is in each case held interlockingly in a concave coupling portion of an adjacent second transmission member in such a way that a tensile force can be transmitted between the first transmission member and the second transmission member.

Abstract: In a multi-function tool structure, a body and a work rod are pivotally connected together and can form a folded and retracted state. Moreover, an elastically movable press button is disposed on the body and can link up a positioning pin movably inserted into the work rod. Thus, pressing the press button can release a lock between the work rod and the positioning pin so that the work rod is swingable, while releasing the press button can lock the positioning pin and the work rod together again. Thus, the work rod and the body can be folded and retracted to facilitate the storage and carrying. After the work rod is developed, it can form multiple included angles with respect to the body so that the requirements of different operation angles can be satisfied.

Abstract: A tool having a flexible extension shaft, a first end and, a second end and capable of being bent about its axis. The tool transfers rotary motion from a device to an implement. Both of the ends may be capable of independently being bent about the axis. The shaft may include a male member and a female member for a kit. Further, one end of the tool may include a rotatable member having a first and second implement.

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 tool having a flexible extension shaft, a first end and, a second end and capable of being bent about its axis. The tool transfers rotary motion from a device to an implement. Both of the ends may be capable of independently being bent about the axis. The shaft may include a male member and a female member for a kit. Further, one end of the tool may include a rotatable member having a first and second implement.

Abstract: Apparatus, devices, methods and systems corresponding to one or more embodiments relating to a jack handle for operation of a vehicle jack is described herein. In one embodiment, a two-piece jack is described. A first piece may include a handle and a first interlock portion. A second piece may include a jack mating portion, a second interlock portion for engagement with the first interlock portion of the first piece and a stopper for preventing the first piece and second piece from becoming disengaged during operation.

Abstract: A flexible tool rod device includes an inner rod unit and a sleeve pipe unit. The inner rod unit includes a drive head, a tool head opposite to the drive head, and a flexible connecting member interconnecting the drive and tool heads. The sleeve pipe unit is made of rigid material and includes a first sleeve pipe and a second sleeve pipe. The first sleeve pipe has a first end portion connected fixedly to one of the drive and tool heads. The second sleeve pipe is telescopically connected to the first sleeve pipe, and is movable relative to the first sleeve pipe between a covered position for providing rigidity to the flexible tool rod device, and an uncovered position to allow resilient deformation of the connecting member.

Abstract: A curled variable radius lever comprises a lever arm 2 of variable effective length that curls and uncurls about a drive axis. In a preferred arrangement the lever assembly has a plurality of rigid blocks 3 articulated together by a chain 4 with link pivots 5 which are affixed to respective blocks 3. Each block 3 has a pair of facing walls 11 and a pair of facing mutually inclined sloping walls 12 which abut when the lever arm 2 is in a curled condition. The lever arm 2 is pulled into the curled condition by a coiled tension spring 13 and restrained in this position by a magnet 9. When it is uncurled the walls 11 abut. The chain 4 then prevents the arm 2 from bending further when a driving force is applied by users to a handle 6. The lever may be used with socket sets, yacht winch, fishing rod reel, a bicycle crank or a jack assembly.

Abstract: Flexible transmission devices, for example for use a tool extensions for effecting rotation of fasteners that are difficult or impossible to access straight on using the normal output of a tool. A series of internal couplers are connected together end-to-end by constrained ball and socket joints that allow tilting between the axes of the couplers while constraining relative rotation of the couplers about said axes. The internal couplers form a flexible shaft inside an outer casing formed by a series of collar-shaped links joined in adjacent pairs by a single-axis pivot connection, each positioned to coincide with a respective one of the ball and socket joints.

Abstract: A foldable hand tool has a handle and a driving head. The handle has a driving head guide groove which extends along the handle and penetrates one side of the handle. A combined lug protrudes from an assembly end of the driving head and is fitted slidably with the driving head guide groove. The driving head is slidable along the driving head guide groove such that the driving head swings perpendicular to the handle. The hand tool can be positioned in a straight configuration or in a T-shaped pattern.

Abstract: A device includes a body having a first end, a second end, and four faces. The device is configured to stand upright on the second end. A plurality of tools is stored against the four faces in a closed position. A first face and a second face each includes a bit storage that holds at least one socket. A third face includes a drive, a can opener, and a blade. The drive and the can opener rotate about a first rotatable mechanism coupled to the second end. The blade rotates about an insert coupled to the first end. A fourth face includes a first set of tool drivers that rotates about a second rotatable mechanism coupled to the second end and a second set of tool drivers that rotates about a third rotatable mechanism coupled to the first end.

Abstract: A dual purpose flip-out and T handle ratchet is able to be used in an L or modified L-handle orientation as well as a T handle orientation. The dual purpose flip-out and T handle includes a handle portion and a ratchet head and neck portion. The handle portion is coupled to the neck portion at a lockable hinge. The hinge allows the head and neck portion to rotate to an L or modified L-handle orientation or to a T handle orientation. When properly oriented the tool is able to be used to tighten or loosen objects such as screws or bolts.

Abstract: The present disclosure relates to a hand-held tool that may be held in the palm of a hand, the hand-held tool being of adequate length and size to allow users to comfortably transfer the tool from a palm grip to a pen grip to maintain the use of the fingers and the thumb when the hand tool is stored in the palm. The hand tool is also equipped with a retractable or nonretractable torque drive shaft designed to allow the fingers and thumb of a user to be rotated freely when the tool is in palm grip and capable of transmitting torque through the housing when an axial pressure force is placed along the drive shaft to engage the tool head with the housing.

Abstract: An auxiliary tool for assembling and disassembling a spark plug is used to assist the assembling and disassembling operation of the spark plug of a vehicle. The auxiliary tool comprises a spark plug sleeve, a flexible extender, and a rotating end portion. The spark plug sleeve is used to cover and rotate the spark plug. The flexible extender has flexibility and one end thereof is fixed on the spark plug sleeve. The rotating end portion is disposed on the other end of the flexible extender and detachably connected with a handle. In operation, the spark plug is firstly loosened by a conventional wrench, and the auxiliary tool then rotates the spark plug. The auxiliary tool is not limited by the limited engine space, so that the operational convenience of rotation operation can be increased and the operational time of assembling and disassembling the spark plug can be shortened.

Abstract: A tool extension for a socket wrench includes a jointed, articulated series of square-drive male/female adapter ends with intermediate couplers having hex ball-head and socket joints. Three such intermediate couplers together in one series allow for an overall 90-degrees of flex. Each coupler has a bell body over which a pliable control cover is stretched. Each hex ball head and socket joint is bridged over by a corresponding pliable control cover which then snaps over a retaining lip just under a neck.

Abstract: Multiple embodiments of a manual tool, for ergonomic, controlled and variable application of rotary motion, torque, and or axial force to an object. One embodiment is comprised of three elongated members connected at their ends in a chain by two pivoted joints. The two outboard members each have an outboard end shaped for connecting to an object to be rotated and a rotatable handle. One way to use the tool is to grasp each handle with a hand; one hand holds the tool in axial alignment and engaged with the object to be rotated and the other hand orbits about the other handle. The three members can be fluidly positioned in a nearly straight Z, crank, L or in-line shape, so as to vary and control the speed, torque, and force. Either end of the tool may be used to rotate an object by swapping the tool end for end.

Abstract: A hand-held tool includes a shaft, a grip movably sleeved on the shaft, a pivot seat pivotally mounted to a rear end of the shaft, a first positioning set is mounted into a terminal of the shaft relative to the pivot seat, a second positioning set embedded into an interior of the grip, an end-piece mounted onto a rear end of the grip, a tubular element rotatably mounted onto a front end of the grip and a limit set extending through the front end of the grip for limiting a rotating range of the tubular element. The total length and the shape of the hand-held tool is changeable sue to the relation between the grip and the shaft.

Abstract: A tool includes a driving member with a protrusion. A shaft is removably connectable to the protrusion. The shaft includes a bit driving segment for retention of a bit therein. A handle includes a first handle portion and a second handle portion, both of which are pivotally connected to the driving member such that the first and second handle portions at least partially encompass the shaft when in a closed position. A bit retention member is disposed in at least one of the handle portions to retain the bit therein. The bit is insertable into the bit driving segment. At least one notch is fashioned into at least one of the handle portions. The notch is in register with the at least one bit retention member, permitting a user to access the at least one bit retained therein.

Abstract: A collapsible, multi-use tool for use in changing a flat tire includes a tool body having a first end including a curved chisel surface and a second end including a ratchet drive head. A central portion of the tool connects the two end portions, the ends of which are hingedly connected to the adjacent first and second ends. Sliding sleeves are disposed over the first and second ends and can be slid towards one another so as to cover the central portion of the tool and the hinged connections to keep the tool in a linear configuration that provides excellent leverage for breaking lug nuts loose. One of the sliding sleeves may be flared at one end so as to receive an end of the other sliding sleeve when coupled together.

Abstract: A device includes a body having a first end, a second end, and four faces. The device is configured to stand upright on the second end. A plurality of tools is stored against the four faces in a closed position. A first face and a second face each includes a bit storage that holds at least one socket. A third face includes a drive, a can opener, and a blade. The drive and the can opener rotate about a first rotatable mechanism coupled to the second end. The blade rotates about an insert coupled to the first end. A fourth face includes a first set of tool drivers that rotates about a second rotatable mechanism coupled to the second end and a second set of tool drivers that rotates about a third rotatable mechanism coupled to the first end.

Abstract: A wrench with a quick rotatable driving head includes a handle, a driving head and a quick-disengaging unit. The quick-disengaging unit is composed of a fixing member secured with the driving head, an operating member inserted through the handle and fitted around the fixing member, and a restraining element transversely provided between the fixing member and the operating member and the handle. The handle and the driving head can be separated by the quick-disengaging unit so that the driving head, with the quick-disengaging unit acting as a pivot, can quickly screw or unscrew a thread locking member, and the operating member can be restrictedly positioned on the fixing member by the restraining element, able to prevent the handle and the driving head from separating.

Abstract: A multi-function socket wrench includes a driving head, a handle, a pivot rod, a first elastic limit unit and a second elastic limit unit. The driving head is pivotally connected with the pivot rod. The driving head can be slidably moved on the handle through the pivot rod and the first elastic limit unit. The driving head and the handle are secured through the second elastic limit unit. The handle and the driving head of the multi-function socket wrench can be turned free as the demand of the user to be a T-shaped socket wrench or operated horizontally.

Abstract: A flexible driver for use within a lumen or other winding cavity. This driver is flexible, versatile, and user customizable. It may consist of a plurality of links and tips depending on the user's needs and the cavity in which it is to be used. It is designed to reduce the amount of unintended and uncontrolled movement between individual link thus eliminating accidental disengagement during use and unintentional rotational movement within the system.

Abstract: A tool having a flexible extension shaft, a first end and, a second end and capable of being bent about its axis. The tool transfers rotary motion from a device to an implement. Both of the ends may be capable of independently being bent about the axis. The shaft may include a male member and a female member for a kit. Further, one end of the tool may include a rotatable member having a first and second implement.

Abstract: An extension shaft for holding a tool for rotary motion of the tool includes a first end adapted to cooperate with a chuck of a handheld instrument and a second end including a tool holder for holding the tool for rotary driven motion thereof. The tool holder includes a base portion operatively connected to the extension shaft and a swivel portion capable of holding the tool. The swivel portion is pivotly coupled to the base portion through a pivot assembly, wherein the tool is capable of being rotated about an angle with respect to an axis of the chuck through rotation of the extension shaft in response to rotation of the chuck.

Abstract: An auxiliary tool for assembling and disassembling a spark plug is used to assist the assembling and disassembling operation of the spark plug of a vehicle. The auxiliary tool comprises a spark plug sleeve, a flexible extender, and a rotating end portion. The spark plug sleeve is used to cover and rotate the spark plug. The flexible extender has flexibility and one end thereof is fixed on the spark plug sleeve. The rotating end portion is disposed on the other end of the flexible extender and detachably connected with a handle. In operation, the spark plug is firstly loosened by a conventional wrench, and the auxiliary tool then rotates the spark plug. The auxiliary tool is not limited by the limited engine space, so that the operational convenience of rotation operation can be increased and the operational time of assembling and disassembling the spark plug can be shortened.

Abstract: A tool extension for a socket wrench includes a jointed, articulated series of square-drive male/female adapter ends with intermediate couplers having hex ball-head and socket joints. Three such intermediate couplers together in one series allow for an overall 90-degrees of flex. Each coupler has a bell body over which a pliable control cover is stretched. Each hex ball head and socket joint is bridged over by a corresponding pliable control cover which then snaps over a retaining lip just under a neck.

Abstract: A router lift adjustment mechanism for an inverted router (50, 52) mounted to a router table (92) comprising an assortment of attachments (98a, 98b, 98c, 98d) that engage the height adjustment mechanism of various types routers. The routers height adjustment mechanism, the attachment (98), a flexible attachment holder (100), a driving shaft (104), and a rotatable adjustment mechanism, typically a hand wheel (122) are contiguously coupled respectfully. The driving shaft is retained by a rocker drive guide (112) providing the driving shaft (104) the ability to rotate and slide to and fro within the bore of a bushing (114) lined rocker drive guide (112). Additionally, the rocker drive guide (112) hinges pivotably on the base mount (128) which is typically mounted to a stable surface.

Abstract: A router lift adjustment mechanism for an inverted router (50, 52) mounted to a router table (92) comprising an assortment of attachments, FIG. 9 (98a, 98b, 98c, 98d) that engage the height adjustment mechanism of various types of routers. The routers height adjustment mechanism, the attachment's (98a, 98b, 98c, 98d), a flexible attachment holder (100), a driving shaft (104), and a rotatable adjustment mechanism, typically a hand wheel (122) are contiguously coupled respectively. The driving shaft is retained by a rocker drive guide (112) providing the driving shaft (104) the ability to rotate and slide to and fro within the bore of a bushing (114) lined within the rocker drive guide (112). Additionally, the rocker drive guide (112) hinges pivotably on the base mount (128) which is typically mounted to a stable surface.

Abstract: A tool includes a first and a second socket wrench pivotally turnably connected to two ends of a link. Each of the first and second socket wrenches includes a wrench portion and a circular end portion having an axial slot extended through them. The wrench portion of the first socket wrench is internally formed of a hexagonally shaped portion for fitting around a hexagonally-shaped outer surface of a connecting ring of a male F connector to tighten or loosen the connecting ring to or from a female F connector, and the wrench portion of the second socket wrench is internally formed of a constant-torque shaped portion for fitting around the hexagonally-shaped outer surface of the connecting ring to prevent the tool from applying an excessive torque on the connecting ring when turning the same. The tool can be used without being hindered by bent or closely arranged cables.

Abstract: A screwdriver handle comprising a base portion adapted to accommodate a screwdriver shaft member; at least one arm pivotally connected to the base portion; a locking sleeve mounted on the base portion; and an electric motor operatively connected to the base portion and adapted to rotate the screwdriver shaft member in any of a clockwise and counter-clockwise manner. The screwdriver handle may further comprise a switch adapted to turn the motor on and off. Additionally, the screwdriver handle may further comprise an electromechanical actuator operatively connected to each of the electric motor and the locking sleeve. Preferably, the locking sleeve is adapted to move along a longitudinal axis of the base portion, and wherein the electromechanical actuator is adapted to prevent the locking sleeve from moving along the longitudinal axis of the base portion.

Abstract: The present invention is a multi-socket wrench that includes an elongated main member with an upper area, a lower area, a first end, a second end, and a middle section. The present invention has at least two wrench units with two sockets positioned side by side thereon. One of the at least two wrench units is rotatably attached at the upper area, and the other of the at least two wrench units is rotatably attached at the lower area of the first end of the elongated main member. The present invention also includes an attachment means for attaching the wrench units to the elongated main member. The present invention also includes at least one pivoting means formed in the elongated main member so that the first end of the elongated main member may be pivotably moved relative to the second end of the elongated main member.

Abstract: A tool includes a driving member with a protrusion. A shaft is removably connectable to the protrusion. The shaft includes a bit driving segment for retention of a bit therein. A handle includes a first handle portion and a second handle portion, both of which are pivotally connected to the driving member such that the first and second handle portions at least partially encompass the shaft when in a closed position. A bit retention member is disposed in at least one of the handle portions to retain the bit therein. The bit is insertable into the bit driving segment. At least one notch is fashioned into at least one of the handle portions. The notch is in register with the at least one bit retention member, permitting a user to access the at least one bit retained therein.

Abstract: An extension shaft for holding a tool for rotary motion of the tool includes a first end adapted to cooperate with a chuck of a handheld instrument and a second end including a tool holder for holding the tool for rotary driven motion thereof. The tool holder includes a base portion operatively connected to the extension shaft and a swivel portion capable of holding the tool. The swivel portion is pivotly coupled to the base portion through a pivot assembly, wherein the tool is capable of being rotated about an angle with respect to an axis of the chuck through rotation of the extension shaft in response to rotation of the chuck.

Abstract: A handled ratcheting tool is able to be used in a standard, L handle or T handle orientation. The handled ratcheting tool includes a handle, a stem, a ratcheting mechanism and multiple tools. Multiple tools are coupled to the ratcheting mechanism which are able to form the L and T configurations depending on which tools are positioned in an open position and which are in a closed position.

Abstract: A foldable tool kit has a ratchet head, a wrench body, a bit holder, a plurality of bits and a gripping handle. A protruding column extends from the ratchet head and is jacketed by an extension rod. The wrench body has a U-shaped cross-section, and side walls of one end of the wrench body form securing plates between which the ratchet head is pivoted. The extension rod opens out from, or closes into, a first opening of the wrench body, and tap holes are provided on side walls of another end of the wrench body. One end of the bit holder has a pivot base, and the pivot base has a pair of first pivot portions corresponding to a pivot hole from two sides of the pivot base. The grip handle also has an inverted U-shaped cross-section and two sides of one end each respectively have a through hole.

Abstract: The present invention provides a universal tool extension rod, including a plurality of universal coupling sleeves and first and second end joints. A corresponding polygonal sphere and polygonal driver are mated between universal coupling sleeves, and the polygonal sphere can slide within the polygonal driver in straight mating or universally flexible states. The first and second end joints can be linked with the universal coupling sleeves similarly, so that the tool extension rod can be combined into a straight state or unhinged into a universally bending state where necessary. Both operating states can realize universality, robustness and durability due to multi-angle ability, high torsion and extensibility.

Abstract: A torque-limiting fastener driver for driving a bone fastener into bone includes a handle supporting a driver shaft. The driver shaft includes limited components which are designed to provide feedback to a user regarding the applied torsional force. In addition, the driver shaft is designed to controllably fail before any potential uncontrolled failure of the distal driving tip. This prevents application of too much torque and controlled design of the shape and size of the failed components.

Abstract: The present disclosure relates to a hand-held tool that may be held in the palm of a hand, the hand-held tool being of adequate length and size to allow users to comfortably transfer the tool from a palm grip to a pen grip to maintain the use of the fingers and the thumb when the hand tool is stored in the palm. One or several storage housings are attached offset from a drive shaft housing for improved torque transfer from a hand to the tool head, integral storage of work pieces, optimized use of palm torque during use, and better overall grasping. The hand tool is also equipped with a retractable or nonretractable torque drive shaft designed to allow the fingers and thumb of a user to be rotated freely when the tool is in palm grip and capable of transmitting torque through the housing when an axial pressure force is placed along the drive shaft to engage the tool head with the housing. The drive shaft can also be reversed to create a prolongation shaft or placed in another opening of the housing.

Abstract: The invention relates to a universal key (1), particularly a control cabinet key, with multiple key arms (2a, 2b, 2c, 2d), on which tool heads (12a, 12b, 13a, 13b) and/or retainers (5) for attaching tool heads (12a, 12b, 13a, 13b) or bits (6) are arranged, where at least one key arm (2a, 2b) forms a pen-shaped, hollow handle (3), and the hollow handle (3) displays at least one opening (10, 11), through which at least one other key arm (2c, 2d) can be folded out and in. (FIG.

Abstract: An extension shaft for holding a tool for rotary motion of the tool includes a first end adapted to cooperate with a chuck of a handheld instrument and a second end including a tool holder for holding the tool for rotary driven motion thereof. The tool holder includes a base portion operatively connected to the extension shaft and a swivel portion capable of holding the tool. The swivel portion is pivotly coupled to the base portion through a pivot assembly, wherein the tool is capable of being rotated about an angle with respect to an axis of the chuck through rotation of the extension shaft in response to rotation of the chuck.

Abstract: A multi-bit screwdriver comprises a housing with a bit chuck at the front end and bit assemblies retained within the housing. Each bit assembly has a tool bit at a front end and a contact surface at a back end. An actuator extends from each bit assembly for operative engagement by a user, for movement of the actuator and bit assembly between a forwardly extended in-use configuration whereat the bit assembly is positioned such that the tool bit extends outwardly from the housing, and the contact surface of the bit assembly is disposed in longitudinal force transmitting engagement against a forward facing abutment surface to preclude rearward movement of the bit assembly due to substantially longitudinally directed forces transmitted from the tool bit, and a retracted configuration whereat the contact surface of the bit assembly is removed in a lateral direction from the longitudinal force transmitting engagement with the forward facing abutment surface.

Abstract: [PROBLEMS] Entire body of a driver is composed of a material which can be sterilized by an autoclave or an ultrasonic cleaner; when the driver is used in a limited space such as in a body cavity, work can be carried out efficiently without causing any trouble with a rotary work, and aspiration aberrant entry can be prevented when the driver body is dropped by mistake; ; and amount of rotation, rotation angle or rotary torque can be recognized even at the molar tooth portion. [MEANS FOR SOLVING PROBLEMS] A driver with a tail in which a metal or resin wire having proper resilient, flexible and shape restoring properties or a rope-like shaft composed of that wire is attached coaxially to a driver having a tip blade corresponding to various screw head fitting shapes of a driver handle on the side opposite to the installation side of the blade, and a rotary gauge or a digital torque sensor display is attached to the tip end of that shaft.