Stanley Proto torque wrenches with interchangeable heads are designed for providing the functionality to take on a variety of assembly and field jobs using fewer wrenches and minimal manual effort. These full interface torque wrenches feature an audible click indicator emitting an audible click that indicates if the requisite torque setting has been reached. They meet ASME B107.14M specifications for delivering accuracies of +/-4% CW and +/-6% CCW and come equipped with a soft and comfortable grip for handling continuous operations.