The Master Lock Solid Body Padlocks feature a 1-9/16 in. (40mm) wide solid brass lock body that is strong, durable and resists corrosion. The 1/4 in. (6mm) diameter shackle is 2 in. (51mm) long and made of hardened steel, offering extra resistance to cutting and sawing. The 4-pin cylinder prevents picking and the dual locking levers provide resistance against prying and hammering. The Limited Lifetime Warranty provides peace of mind from a brand you can trust.