The Master Lock No. 120D solid brass padlock features a 3/4 inch (19 mm) wide solid brass lock body that is strong, durable and resists corrosion. The 5/32 inch (4 mm) diameter shackle is 7/16 inch (11 mm) long and made of steel, offering resistance to cutting and sawing. The limited lifetime warranty provides peace of mind from a brand you can trust.