A torque multiplier is a tool used to provide a mechanical advantage in applying torque to turn bolts, nuts or other items designed to be actuated by application of torque, such as the actuation of valves, particularly where there are relatively high torque requirements. Use of long levers can be dangerous. In the confines of a nacelle, long torque arms are impractical. Torque multiplier allows reducing the lever length or operation effort by a factor of 5, 25, or 125. Torque Multipliers are especially useful breaking loose stubborn or frozen bolts, and are widely used for a 10% verification of bolted joints. Accuracy of the torque value improves when applying torque smoothly and slowly. Torque multipliers do this by removing much of the physical effort from the tightening task.