The Master Lock No. 187XD shrouded padlock features a 2-5/16 inch (59 mm) wide stainless steel body for maximum strength, reliability and corrosion resistance. The fully shrouded design minimizes shackle exposure and protects against bolt cutter attacks. 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 levers provide resistance against prying and hammering.