The Master Lock No. 174SSD padlock features a 2-1/4in (57mm) wide stainless steel body for strength, reliability and weather resistance. The 5/16in (8mm) diameter shackle is 1-1/16in (27mm) long and made of stainless steel, offering extra resistance to cutting, sawing and weather. The roller pin mechanism provides maximum protection against attacks. The sealed dials and shackle 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. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.