Are Impact Wrenches Adjustable? | WG- adjustable electric impact torque wrench ,Are Impact Wrenches Adjustable? An impact wrench is a power tool that automatically rotates to complete tasks without much effort from the user. The purpose of an impact wrench is to exert high torque onto other objects, usually to loosen them. ...Amazon: Adjustable Torque Impact Wrench10/8/2020· Most modern impact wrenches are equipped with a torque adjustment feature. The main purpose of this function is to prevent fasteners from overtightening, breaking the thread or head. The adjustment will be useful for tightening relatively small nuts and bolts with a high torque tool.