175-D 1" COMBINATION LOCK | The Master Lock Number 175D Set Your Own Combination Padlock features a 2 in (51 mm) wide solid body for strength and reliability. The 5/16 in (8 mm) diameter shackle is 1 in (25 mm) long and made of hardened steel, offering extra resistance to cutting and sawing. The 4-digit dialing allows for thousands of possible numeric combinations. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.