A wrench is a commonly used mounting and dismounting tool that is a hand tool that uses a lever principle to twist a bolt, screw, nut, and other threaded opening or socket firmware that holds a bolt or nut. Wrenches are usually made of structural steel of carbon or alloy material.
The wrench usually has an opening or a sleeve hole for clamping a bolt or a nut at one or both ends of the shank, and an external force is applied to the shank in the direction of the rotation of the thread during use, so that the bolt or the nut can be screwed.
