Abstract: A ratchet wrench includes a body, a ratchet wheel, a pawl, a switch unit, a ring, a top clip and a bottom clip. The body includes a through hole, a first recess, a second recess, a top recessed area and a bottom recessed area to accommodate the ratchet wheel, the pawl, the switch unit, the ring, the top clip and the bottom clip. The ratchet wheel has a first pivotal portion, a top groove, a second pivotal portion and a bottom groove. The pawl has a notch. The switch unit is pivoted to control the movement of the pawl in the first recess. The ring is located in the top recessed area and has a fourth pivotal portion connected to the first pivotal portion. The top clip and the bottom clip respectively clip two ends of the ratchet wheel to restrict the ring and the ratchet wheel.

Abstract: A pipe wrench includes a fixed jaw with alternatively located first recesses and first driving faces defined in the inner side thereof. A pivotal member is pivotably connected to the fixed jaw and a resilient member is biased between the fixed jaw and the pivotal member. The pivotal member has alternatively located third recesses and second driving faces. A hexagonal space is defined between the first and second driving faces. The end portion of the pivotal member is inserted into a second recess defined in the inner side of the fixed jaw. The object is clamped in the hexagonal space, and the pivotal member can be pivoted away from the fixed jaw. The pipe wrench is able to quickly clamp and dismounted from the object.

Abstract: A ratchet wrench includes a body, a driving unit, a control unit, a first rotary unit, a second rotary unit and a second connector. The body has a first recess and a restriction portion. The driving unit is connected to the working end of the body and is driven by the control unit to allow the wrench to be rotated clockwise or counter clockwise. The first rotary unit has a first rotary rod, a third toothed ring, a sleeve, a first clip, a second resilient member and a bead. The second rotary unit has a second rotary rod, two caps, a second resilient member, a third rotary rod and a handle. The second connector is located in the restriction portion. The second connector is located corresponding to the groove of the first rotary rod, so that the first rotary rod does not drop from the first recess.

Abstract: An open wrench includes two heads overlapped to each other, two covers connected to top and bottom of the heads, and a pawl. Each head has a first recess, a recessed section, a contact face, and a second recess. The pawl is movably located within the second recess. The pawl has a first engaging portion, a second engaging portion, a reception slot and a curved slot. A resilient member is located in the reception slot. A pin extends through the covers and the curved slot. The pin contacts one end of the resilient member and contacts one inner end of the curved slot. When an object is located in the first recess, the contact face contacts one side of the object, and the first and second engaging portions contact two adjacent sides of the object. The object can be rotated continuously.

Abstract: An open wrench includes an elongate body with a head located on an end of the body. The head includes two jaws and a mounting hole is defined between the two jaws. One of the jaws has a curved recess, a curved guide slot and a notch defined in the inside thereof. The other jaw has a curved convex contact face protruding from the inside thereof. An engaging member is movably located in the curved guide slot and a resilient member biases the engaging member which performs as a ratchet wrench. Two covers are respectively connected to the top and the bottom of the head to cover up the engaging member and the resilient member.

Abstract: A torque wrench includes a driving head, a hollow handle, compression unit, an adjustment unit, an index unit and a display unit. The driving head and the handle are pivotably connected to each other. The compression unit has a resilient member and an end piece which contacts the driving head. The adjustment unit adjusts the length of the resilient member to set the torque of the wrench. The index unit has a first index and a second index, both of which are moved with the movement of the adjustment unit. The movement of the first index is detected by the display unit and transferred into digits to display the value of the torque. The second index is cooperated with the marks of the scale member to display the value of the torque.