The Master Lock #175D set your own combination padlock features a 2 in (51 mm) W solid body for strength and reliability. The 5/16 in (8 mm) diameter shackle is 1 in (25 mm) L and made of hardened steel, offering extra resistance to cutting and sawing. The four-digit dialing allows for thousands of possible numeric combinations. The limited lifetime warranty provides peace of mind from a brand you can trust.