The Master Lock No. 875D Padlock features a 2in (51mm) wide zinc body for strength and reliability. The 5/16in (8mm) diameter shackle is 1in (25mm) long and made of hardened steel, offering extra resistance to cutting and sawing. The roller pin mechanism provides maximum protection against attacks. The shackle seal offers superior weather protection. The lock includes set your own combination convenience, without the need for a reset tool. The 4-digit dialing allows for thousands of possible numeric combinations.