This lineman wrench is made with alloy steel. Jaws are designed so that a nut, bolt, or pipe is drawn further into the throat as pressure is applied. One side of the jaw is suitable for minor hammering. Three different thread chasers in the handle: sized 3/8″, 1/2″, and 5/8″. Open end of jaw measures 1 3/8″. Overall Length: 11 7/8″.