The Master Lock no. 7D laminated padlock features a 1-1/8 in. (29 mm) wide laminated steel body for maximum strength and reliability. The 3/16 in. (5 mm) diameter shackle is 9/16 in. (14 mm) long and made of steel for resistance to cutting and sawing. The 4-pin cylinder prevents picking and the dual locking ball bearings provide resistance against prying and hammering. The limited lifetime warranty provides peace of mind from a brand you can trust.