Abstract: A tool including two pivotally connected handles and a tool head. The tool head is composed of two clamping members which are pivotally connected. The clamping members are further pivotally connected with the handles to form a double lever structure. When the handles are relatively pivoted, the clamping members are driven and pivoted relative to each other to clamp a work piece. One of the handles has a projecting block, while the other of the handles is formed with at least one slot cooperating with the projecting block. The slot is positioned in the moving path of the projecting block when the handles are relatively pivoted. By means of cooperation between the slot and the projecting block, the pivoting angle of the handles is restricted.

Abstract: A wrench structure with a multiple-thread worm includes a main body having a handle extending from the main body. A fixed jaw projects from one end of the main body opposite to the handle. The main body is formed with a slide channel and a movable is partially received in the channel and moved corresponding to the fixed jaw. The movable jaw has a rack extending therefrom and slidably received in the channel. A receiving hole is defined in the main body and communicating with the channel. The multiple-thread worm is rotatably received in the receiving hole and engaged to the rack of the movable jaw. The multiple-thread worm has multiple parallel spirals spaces from each other.

Abstract: A wrench structure including a main body having a handle extending therefrom. A fixed jaw projects from one end of the main body opposite to the handle. A movable jaw is disposed at the end of the main body and slidable relative to the fixed jaw. The main body is formed with a receiving hole. A worm is disposed in the receiving hole and engaged with a rack of the movable jaw. The worm is a multiple-thread worm having multiple parallel spirals spaced from each other. The multiple-thread worm has an elongated pitch, whereby when turning the worm, the movable jaw can be quickly moved to adjust the position thereof.

Abstract: A tool structure including two grips and a tool head. By way of an opening of a first pivot section of the grip, the first pivot sections of the grips can be separated, permitting the grips to be folded to two sides of the tool head. This reduces the room occupied by the tool and facilitates storage and carriage of the tool. The first pivot sections of the grips are spaced from the second pivot sections of the tool head by a certain distance to form a double-lever structure and prolong the length of the force application arm so as to save strength.

Abstract: A pincers includes two main bodies, a fixing member, a treatment member, a tightening member and a resilient member. By utilizing the treatment member, the fixing member and the resilient member disposed between the main bodies and the fixing member, the pincers has a good mating relationship and can be easily assembled so that the using effect of the pincers is improved.

Abstract: A tool includes two grips and at least one tool head. The grips can be opened to different extents so as to rotate the fixing pins of the grips relative to the openings of the tool head. Accordingly, the short sides of the fixing pins can be respectively aligned with the openings to permit the detachment of the grips from the tool head. Otherwise, the grips are stopped by the long sides of the fixing, pins from detaching from the tool head. The grips can be easily and quickly assembled with or disassembled from the tool head. In addition, the replacement of the tool head can be performed by hand without using any tool or switch. Also, the tool has fewer components which are not easy to miss.