Torque Wrench
Torque wrenches come in two varieties: click type and direct reading. The click-type torque wrenches are used mostly for tightening. When the set torque is achieved a click sound indicates that it is tightened to completion. The direct-reading torque wrenches are used mostly for measuring and inspection; they display measurement values. Pokayoke (error-proofing) torque wrenches help prevent human tightening errors. They come in three varieties: wired, wireless, and marking. The click type and direct-reading type both have models that transfer measurement results wirelessly.