Abstract: A quick-release bit adapter includes a body having first and second ends spaced along a longitudinal axis. The body includes a driving hole extending from the first end towards the second end along the longitudinal axis. The body further includes a sliding groove in communication with the driving hole and intermediate the driving hole and the second end along the longitudinal axis. A through-hole extends from an outer periphery of the first end through the sliding groove. A bit received in the driving hole abuts and is stopped by at least one protrusion extending inward from an inner periphery of the driving hole towards the longitudinal axis. A magnetic device is slideably received in the sliding groove and controllable by a user through the through-hole to slide along the longitudinal axis between two positions to engage with or disengage from the bit.

Abstract: A ratchet wrench includes a head rotatably receiving a drive member. The head includes an end wall having a hole. One of an inner face of the end wall and an end face of the drive member defines a first abutment face. The other of the inner face and the end face includes an annular groove having a bottom wall defining a second abutment face. A dustproof ring is mounted and compressed in the annular groove. The dustproof ring in an uncompressed state has a natural maximum height along a rotating axis of the drive member larger then a spacing between the first and second abutment faces. The dustproof ring includes three sealing units along a radial direction perpendicular to the rotating axis. Each sealing unit has a thickness along the rotating axis smaller than the spacing.

Abstract: A universal joint includes a coupling member having an end for coupling with a tool. A body includes a rounded base pivotably mounted to the other end of the coupling member. The body further includes a drive column spaced from the rounded base along an axis. A reinforcing section is intermediate the rounded base and the drive column. The reinforcing section includes an outer periphery having a recessed portion with a receptacle extending in a radial direction perpendicular to the axis. A control member is moveably received in the receptacle to control coupling of the drive column and an object to be driven. In any case, a spacing from an outer end of the control member to the axis in the radial direction is substantially not larger than a spacing from the outer periphery of the reinforcing section to the axis in the radial direction.

Abstract: A ratchet wrench (10) includes a head (12) having a compartment (121) rotatably receiving a drive member (12). An annular groove (126) is formed in an inner periphery of the compartment (121) and in communication with a recess (13) formed in a side (F2) of the head (12). A flange (2121) is formed on an outer periphery of the drive member (21) and intermediate a toothed portion (213) of the drive member (21) and an annular groove (214) formed in the outer periphery of the drive member (21). A flange (2121) is formed on the outer periphery of the drive member (21) and includes an inner end face (2122) facing a bottom face (133) of the recess (13). A C-clip (24) is received in the annular grooves (126, 214) and has two clamping portions (241) received in the recess (13). A dustproof cap (30) engaged in the recess (13) and located intermediate a bottom face (133) and the recess (13) and the inner end face (2122) of the flange (2121).

Abstract: An open end wrench includes first and second jaws. The first jaw includes an arcuate sliding groove having two support walls and an arcuate sliding wall between the support walls. A slide is slideably received in the sliding groove and includes an arcuate sliding face slideable along the sliding wall. Two wings respectively extend from top and bottom faces of the slide. Top and bottom extension faces extend from a wrenching face of the slide and are located on inner faces of the wings. A spacing is formed between an outer face of each wing and one of the support walls to avoid friction, allowing smooth movement of the slide between an extended position and a retracted position.

Abstract: An open end wrench (10) includes first and second jaws (23, 24) formed on a jaw portion (22). The first jaw (23) includes an arcuate sliding groove (27) having two support walls (272, 273) and an arcuate sliding wall (271) between the support walls (272, 273). A slide (30) is received in the sliding groove (27) and includes an arcuate sliding face (31) slideable along the sliding wall (272). An arcuate guiding slot (35) is formed in the slide (30). A guide (28) is fixed in the sliding groove (27) and received in the guiding slot (35). The guiding slot (35) includes a pressing end (352). An elastic device (40) has two ends respectively abutting the guide (28) and the pressing end (352) of the guiding slot (35) for biasing the slide (30) to a natural position. The slide (30) includes a first wrenching face (32) having two wings (36). A spacing (L) is formed between each wings (36) and one of the support walls (272, 273).

Abstract: A tool box includes a body having a front end and a force-receiving portion spaced from the front end. The body further includes first and second sides and two lateral walls. The front end includes a driving groove for receiving a shank in an operative position. A receiving space is defined between the lateral walls and has an opening. The force-receiving portion includes an insertion groove for receiving the shank in a storage position. The insertion groove is in communication with the driving groove of the body. The body further includes a first opening extending from one of the lateral walls through the insertion groove and a second opening extending from the other lateral wall through the insertion groove, allowing access to the shank in the storage position for manual removal of the shank from the insertion groove. A bit-receiving rack is removably received in the receiving space.

Abstract: A caliper includes two legs pivotably connected together at first ends thereof. Second ends of the legs can abut opposite first and second sides of an object to be gauged. Each leg includes first and second faces extending between the first and second ends. A scale is formed on the first surface of each leg. Each leg further includes an inclined surface between the first and second faces. The size of the object is indicated by an intersection of the scales. The inclined surfaces of the legs abut third and fourth faces of the object so that the gauging result is reliable.

Abstract: An electronic torque wrench includes a body (10) having a driving portion (12; 15; 16; 17) and a shank (11) interconnected to the driving portion (12; 15; 16; 17). The shank (11) includes a first pivotal portion (112) spaced from the driving portion (12; 15; 16; 17) along a longitudinal axis (A). An object can be driven by the driving portion (12; 15; 16; 17) to rotate about a rotating axis perpendicular to the longitudinal axis (A). A torque sensor (32) is mounted to a detecting portion (111) of the shank (11) intermediate the first pivotal portion (112) and the driving portion (12; 15; 16; 17). A handle (20) includes a second pivotal portion (212) pivotably connected to the first pivotal portion (112). A torque display device (30) is mounted to the handle (20) and electrically connected to the torque sensor (32). The torque sensor (32) detects torque applied from the driving portion (12; 15; 16; 17) to the object and sends a signal indicative of the torque to the torque display device (30).

Abstract: A rotary wrench includes a handle having a clamping portion with two arms. Each arm includes a holding portion having a hole. At least one of the holding portions includes a positioning section. Two axles are respectively formed on two sides of a head and rotatably engaged in the holes. At least one of the sides of the head includes a positioning portion releasably engagable with the positioning section so that the head is rotatable relative to the handle about an axis and positionable relative to the axis in one of a plurality of angular positions surrounding the axis. An adjusting member is mounted to the arms and operable to adjust the spacing between the arms to move the arms between a clamping position clamping the head and a releasing position not clamping the head.

Abstract: A ratchet wrench includes a head and a handle interconnected to the head. The head includes a first compartment rotatably receiving a drive member. Two pawls are slideably received in a compartment of the head. A switch is slideably received in a third compartment of the head between first, second, and third operative positions to change the driving direction of the ratchet wrench. An actuator is slideably received in the second compartment and includes two guiding portions selectively engaged with one of the pawls when the switch is in one of the first and second operative positions. The pawls are disengaged from the guiding portions and engaged with the drive member when the switch is in the third operative positions, allowing the handle and the drive member to rotate in either of two directions driving a fastener, and not allowing free rotation of the handle relative to the drive member in either of the two directions without driving the fastener.

Abstract: A coupling device includes a body having an end for coupling with a handle. The body includes a compartment having a receiving space for receiving an object such as a bit. The receiving space includes a slanted face extending longitudinally outward and radially inward. A follower is slidably mounted in the compartment and includes an outer end having a restraining hole. A positioning member extends from a radially outer side through the restraining hole to a radially inner side of the follower and is slidable along the slanted face. The follower is biased outward by an elastic element toward the receiving space when the object is inserted into the receiving space and moves the follower longitudinally inward. A radial clamping force is imparted from the slanted face through the positioning member to securely clamp the object in the receiving space.

Abstract: A ratchet device includes a body having a compartment extending along a first axis. A ratchet member is rotatably received in the compartment about the first axis. The body includes first and second sides each having a receptacle in communication with the compartment. A ratchet block is received in each receptacle. A control member is received in a groove in a top side of the body. The groove is in communication with the compartment via an opening. The control member is movable between three positions along an axis perpendicular to but spaced from the first axis to disengage a toothed portion of either of the ratchet blocks from teeth on the ratchet member so as to control the driving direction of the ratchet device.

Abstract: A tool box includes a body having a front end and a force-receiving portion spaced from the front end. The body further includes first and second sides and two lateral walls. The front end includes a driving groove for receiving a shank in an operative position. A receiving space is defined between the lateral walls and has an opening. The force-receiving portion includes an insertion groove for receiving the shank in a storage position. The insertion groove is in communication with the driving groove of the body. The body further includes a first opening extending from one of the lateral walls through the insertion groove and a second opening extending from the other lateral wall through the insertion groove, allowing access to the shank in the storage position for manual removal of the shank from the insertion groove. A bit-receiving rack is removably received in the receiving space.

Abstract: A ratchet wrench includes a head having a compartment rotatably receiving a drive member. A pawl groove is formed in an inner periphery of compartment and slideably receives a pawl. A switch is received in a switch grove in the head and pivotable about a pivoting axis. A control member is movable between two positions to control engagement between the pawl and the drive member through sliding movement of a guide of the switch in a control groove in the control member. The guide of the switch contacts the contact groove at a contact point when the control member is in either operative position. A tangent to an outer surface of the guide at the contact point has an angle not larger than 45° relative to a reference line extending perpendicularly to the pivoting axis and intersecting a longitudinal axis of the guide.

Abstract: A ratchet wrench includes a head (11) having a through-hole (13) rotatably receiving a drive member (20). Two pawls (30) are pivotably received in two compartments (21) in the drive member (20). Each pawl (30) includes first teeth (31) on a first end (60) thereof and second teeth (32) on a second end (62) thereof. Each pawl (30) includes first second, and third positioning faces (351, 352, 353) on an inner side (64) thereof. A control member (40) is rotatably received in the drive member (20) and movable between first, second, and third operative positions to change the driving direction of the ratchet wrench. The center (C) of the third positioning face (353) of each pawl (30) is not coincident to the center of the inner side (64) of the pawl (30).

Abstract: A ratcheting wrench includes a handle, a head extending from an end of the handle and having a hole communicated with a compartment in the end of the handle, a drive member rotatably mounted in the hole of the head, and a ratcheting mechanism. The drive member includes an inner periphery for securely holding a fastener-driving member, allowing joint rotation when the drive member is turned. A retainer is mounted around the end of the drive member and has two resilient portions extending into the hole of the drive member via the slots for rotatably holding the drive member in the hole of the head and for securely, releasably holding the fastener-driving member in the hole of the drive member.

Abstract: A ratchet wheel includes an inner periphery and an outer periphery. The outer periphery includes a number of arcuate concave teeth each having two sides and an intersection of the two sides. The ratchet wheel includes a center, a line from the center to the intersection dividing an angle between the two sides into two unequal portions, thereby forming asymmetric arcuate concave teeth to provide improved structural strength and improved torque. In another embodiment, the concave teeth are non-arcuate to reduce the formation time for the teeth, thereby reducing the production cost.