Pliers handles, claw hammers, screwdrivers, and wrenches are all levers. The normal use of the screwdriver should be the axle of the lever type machine. When using it, it is the most labor-saving to hold the handle end. The larger the power arm, the more labor-saving Claw Hammer. When using the hammer head like a shofar The part that uses nails and the like is a lever tool that uses a lever principle to twist bolts, screws, nuts, and other hand tools that hold the opening or sleeve firmware of the bolt or nut.TPR handle claw hammer