The Master Lock 630DAST Set Your Own Combination Padlock features a 1-3/16in (30mm) wide solid metal body for durability. The 3/16in (5mm) diameter shackle is 1in (25mm) long and made of nickel plated steel, offering resistance to cutting and sawing. The 4 dial combination security offers keyless convenience. The Limited Lifetime Warranty provides peace of mind from a brand you know and can trust.