The Master Lock Number 647D Set Your Own Combination Padlock features a 1-3/16 in (30 mm) wide metal body for durability. The 3/16 in (5 mm) diameter shackle is 7/8 in (22 mm) long and made of steel, offering resistance to cutting and sawing. The 3 dial combination security offers keyless convenience. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.