The Master Lock No. 1D laminated padlock features a 1-3/4 inch (44 mm) wide laminated steel body for maximum strength and reliability. The 5/16 inch (8 mm) diameter shackle is 15/16 inch (24 mm) long and made of hardened steel, offering extra resistance to cutting and sawing. The 4-pin cylinder prevents picking and the dual locking ball bearings provide resistance against prying and hammering. Padlock1-3/4" wide laminated casePin tumbler security2 brass keysThousands of changesDual ball bearing locking for maximum pry resistance15/16" vertical and 3/4" horizontal clearancesKeyed differently