Master Lock Padlock Titanium 2-5by16 inches Keyed Different Clamshell (Pack of 4) The Master Lock No. 187XD Shrouded Padlock features a 2-5/16in (59mm) 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 5/16in (8mm) diameter shackle is 15/16in (24mm) 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 Weather Tough sliding keyway cover keeps dirt and grime from jamming the locking mechanism