The present invention provides an extendable wrench comprising: a wrench having a head portion and a shaft connected to a rear end of the head portion; an insertion hole recessed at a rear end of the shaft; a cover to dismountably close the insertion hole; an extension rod with a front end formed with a plug to be plug-connected with or separated from the insertion hole of the wrench; and an elastic positioning member provided between the plug of the extension rod and the insertion hole of the wrench, when the plug of the extension rod is plug-connected with the insertion hole, the elastic positioning member keeps the plug in position. Thereby, the wrench can be operated independently; when application of larger operating torque is required, the extension rod can be combined with a rear end of the wrench to form a longer operating arm of force to meet the requirements of large torque.

A hand tool including a control element for receiving one or more finger digits of a user. The control element is positioned on the body component and may be in the form of an aperture defined by a perimeter surface. A user places one or more fingers within the control element and applies pressure to rotate the body component.

A hand tool includes an elongate, plate shaped steel core having a top face and a bottom face in parallel planes, a drive head portion formed at one end of the steel core and having a drive head cavity formed therein, a tang portion extending from the drive head portion to the other end of the steel core, a ratchet assembly disposed in the drive head cavity, and a first encapsulation layer covering the tang portion and the drive head portion, but not covering at least a portion of the ratchet assembly. The first encapsulation layer may include a fiber reinforced plastic composite material.

A one-hand bit releasing hand tool includes a hand tool main body having a first drive section, which has a first drive hole and a receiving hole with a stepped portion arranged therebetween; and a positioning and releasing assembly, which includes a positioning member disposed in the receiving hole and supported on the stepped portion to apply an action force on and thus position a bit placed into the first drive hole and a releasing member disposed in the receiving hole and reciprocally movable between a positioning position and a releasing position. When the bit is placed into the first drive hole, the releasing member moves from the releasing position to the positioning position; and when the releasing member is moved from the positioning position to the releasing position, the releasing member resists the action force of the positioning member to release the bit.

A tool for a bone implant includes a rod and an adaptor. The rod includes a coupling portion having a through-hole. The rod further includes a measuring arm connected to the coupling portion and a force applying arm connected to the coupling portion. The measuring arm includes a first extension section having a first indicator portion, and the force applying arm includes a second extension section having a second indicator portion. The force applying arm is elastically deformable away from the measuring arm to displace the second extension section relative to the first extension section. The adaptor is coupled in the through-hole and includes an outer ring and an inner ring. The outer ring is rotatable relative to the inner ring in a single direction.

A locking clutch having an inner race that is rotatable with respect to an outer race. One of the races is cylindrically shaped and rotates adjacent to a race having valleys. Each valley is connected to an inclined surface. Rollers are located adjacent to the valleys. A cage having fingers may be restrained with respect to the valleys to set the starting position of the rollers. The cage may be selectively restrained to determine the direction in which the rollers are wedged to determine a direction that drives the rollers into contact with both races to lock the races with respect to each other. Rotation of the inner race with respect to the outer race in a direction opposite direction is a free rotating direction. The locking clutch is designed to simultaneously engage all of its rollers to evenly distribute the forces amongst them.

An electric ratchet wrench as one example of the ratchet wrench includes an electric motor, a holder that rotatably holds a socket via a one-way clutch mechanism, and a spindle configured to convert a driving force from the motor into a reciprocating rotation motion of the holder. A space is provided between the socket and the holder. The space includes large interval portions and small interval portions. The small interval portions are adjacent to the large interval portions in a rotation direction (lock direction) of the socket and have distances smaller than distances of the large interval portions. Additionally, the one-way clutch mechanism includes columnar locking pins disposed between the spaces and have a diameter with a size equal to or less than the distances of the large interval portions and exceeding the distances of the small interval portions.

A socket wrench includes a ratcheting end including a circular opening, a crescent recess disposed on one surface, the crescent recess being adjacent to the circular opening and communicating therewith, the crescent recess having a through hole open to the other surface, and two opposite cavities at both ends of the crescent recess respectively; a cylindrical socket disposed in the circular opening; a crescent cover including two opposite projections on an outer surface, a circular hole in an intermediate portion, and two grooves adjacent to the projections respectively, the crescent cover being disposed on the crescent recess with the projections positioned in the cavities respectively; a pivotal pawl having a threaded hole, the pivotal pawl being disposed through the circular hole to align with the through hole; and a threaded fastener driven through the through hole into the threaded hole to pivotably fasten the pivotal pawl.

A driving shank assembly includes a tube, a drive head, a connector, and two quick release nuts. The tube has two enlarged portions each having a mounting recess and an external thread. Each of the enlarged portions has a plurality of slits and a plurality of elastic clamping pieces between the slits. The drive head has a driving recess and a mounting shaft. The mounting shaft of the drive head is inserted into the mounting recess of the tube. The connector has a mounting shaft and a connecting shank. The mounting shaft of the connector is inserted into the mounting recess of the tube. The connecting shank of the connector has a retaining groove for mounting an actuating tool. Each of the quick release nuts has an internal thread screwed onto the external thread of the tube.

A ratchet wrench system and kit enable users thereof to enhance grip and mechanical advantage in applying torque to either (a) rotate rotary fasteners or (b) prevent rotary fastener rotation. The ratchet wrench system and kit include at least one ratchet wrench assembly and at least one ratchet interface. The ratchet wrench assembly has a ratchet head and a lever arm. The ratchet head has a male side and a female side. The female side includes both deep and shallow sections. Long and short ratchet interface elements both include a male interface end and a female interface end. The male and female interface ends are respectively matable with the female and male sides of the ratchet wrench assembly. The long and short ratchet interfaces are interchangeably matable with the ratchet wrench assembly for enabling a secondary wrench to grip and enhance mechanical advantage via the ratchet wrench assembly.