The Master Lock No. 37D laminated padlock features a 1-9/16 in wide laminated steel body for maximum strength and reliability. The armored hardened steel shackle is 15/16 in long and includes a shackle guard to protect against bolt cutters and hacksaws. 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.