torque wrench



  • A tool used to turn nuts, bolts, and other similarly threaded fasteners. Unlike other types of wrenches, torque wrenches have a built-in device that measures the amount of torque (the turning or twisting force) applied to a nut or bolt. The device may be an audible signal, a scale built into the handle, or a dial, calibrated scale, or light. Torque wrenches limit the maximum amount of force that can be used, thereby preventing damage to the fastener and the material to which it is fastened.