A torque wrench includes a handle, a wrench, a clutch, an adjustor, a grip, a scale ring and a locking collar. The wrench includes a lever inserted in and pivotally connected to the handle. The clutch is connected to the lever to stop rotating a workpiece when a maximum value of torque is reached. The adjustor is connected to the clutch and includes a knob operable to adjust the maximum value of torque. The knob is provided with a first color. The grip is connected to the handle. The scale ring is connected to the grip. The locking collar is provided with a second color. The locking collar is movable between a locking position to prevent the knob from rotation relative to the grip and show the first color and an unlocking position to allow the knob to rotate relative to the grip and show the second color.

A hand tool is provided, including: a first member; a second member; a shaft, connected with the first member, rotatably inserted to the second member, including positioning slots; and a control member, disposed on the second member, including at least one tooth; wherein the control member can be released by disengagement of the at least one tooth from the positioning slots so that the first and second members are rotatable relative to each other, and the control member can be locked by engagement of the at least one tooth within at least one of the positioning slots so that the first member is non-rotatable relative to the second member; wherein when the at least one tooth is engaged within at least one positioning slot, at least one blocking wall of the tooth is in gapless surface contact with at least one side wall of the slot.

A wrench sound seat lubrication structure includes: a seat member having an oil receiving space formed at a hollow internal thereof, a top end of the seat member having an opening formed thereon; one or a plurality of through holes formed to penetrate through a side wall of the seat member and fluidly connected to the oil receiving space; an actuating member pivotally attached to the opening on the top end of the seat member. The user is able to store a lubricant oil inside the oil accommodating space in advance. During use, the lubricant oil is slowly released from the through holes and the top opening, allowing the outer side of the seat member to be lubricated for a long period of time, thereby prolonging its useful lifetime.

A dual ratcheting tool having multiple ratchet assemblies and handles for rotating adapters, sockets, and other tools is provided. The dual ratcheting tool includes an upper ratchet assembly independently rotationally and mechanically connected to a lower ratchet assembly; a drive member connected to the upper ratchet assembly and the lower ratchet assembly; an upper handle connected to the upper ratchet assembly, the upper handle having an upper directional switch to set a drive direction of the upper ratchet assembly; and a lower handle connected to the lower ratchet assembly, the lower handle having a lower directional switch to set a drive direction of the lower ratchet assembly. The upper and lower handles of the dual ratcheting tool can independently and in combination can drive a socket more quickly and efficiently than ratchets having a single ratchet assembly and handle.

A tool for retracting pistons into cylinder bores is disclosed, with a narrow gap between facing pressure plates allowing use of the tool in tight places, and ratcheting spreading of the facing pressure plates causing outward moving of the pistons, enabling work to be performed, wherein movement of a threaded stud through a coupler moves a first pressure plate.

A ratchet wrench with electric assistance includes a wrench body, a ratchet device, a pawl device, and a switch device. The switch device is configured for optionally gearing the pawl device with the ratchet device, so that the ratchet wrench is operated in a clockwise or counterclockwise direction. During the directional changing process, the switch device optionally engages the first gear and the second gear with the transmission gear of the power device, such that the power device transmits the power to the ratchet device for controlling the clockwise or counterclockwise rotation of the ratchet device, realizing the ratchet wrench with an electric assistance function.

A torquing tool having an apertured head supporting a perimetral toothed surface closable about a rotary object in a self-fitting/clamping manner, wherein the aperture head provides a ratchet enable pawl operatively associable with the perimetral toothed surface.

A dustproof structure of a hand tool includes a tool body and a dustproof element. The tool body has a shank. A predetermined portion of the shank is concavely provided with a through hole. The dustproof element is flexible, is provided at the through hole of the shank, and can be opened and closed. The dustproof element closes the through hole when not subjected to an applied force and is elastically deformed to render the through hole into an open state when subjected to the applied force. In normal conditions, therefore, the dustproof element can block foreign matter from entering the through hole. When it is desired to perform a lubricating or adjusting operation on a component in the through hole of the hand tool, the operation can be carried out after directly applying a force to, and thus deforming, the dustproof portion, without having the dustproof element removed.

A unidirectional ratchet wrench structure has a wrench member, a pawl and a ratchet. The wrench member has an accepting space for accommodating the ratchet and an accepting space for accommodating the pawl. A toothed section of the pawl has a plurality of equiangular teeth and an irregular tooth. Since the irregular tooth is lower than the height of the equiangular teeth, the irregular teeth irregular tooth is capable of quickly disengaging from the equiangular teeth of the ratchet. The arc section and the toothed section have different arc measures and not push against the outer periphery of the ratchet at the same time, through the abutment of the pivoting point and the change of the center of gravity of the pawl when the wrench is rotated, the pawl is capable of producing a seesaw yaw movement to achieves the effect of quick engagement and disengagement.

A ratchet wrench capable of quickly mounting and dismounting a bit includes a wrench body and a ratchet wheel rotatably disposed in the wrench body. One side of the ratchet wheel is formed with a slide trough. An end cap is slidably disposed in the slide trough. Another side of the ratchet wheel is formed with a polygonal hole communicating with the slide trough. When a bit is inserted in the polygonal hole, the bit can be quickly positioned by block of the end cap. When the bit is about to be taken out, the bit can be pushed out of the polygonal hole via pressing the end cap, so that the bit can be taken out quickly.