The Master Pro Series Steel padlock has armoured protection against bolt cutters due to its shrouded shackle. It is a high security padlock which can with stand physical attack & will work perfectly in extreme weather conditions. 2-1/8" (54mm) wide laminated steel body for superior strength Hardened boron alloy shackle for superior cut resistance Solid iron shackle shroud resists harsh physical attacks 5 spool pin tumbler cylinder for added pick resistance Removable cylinder can be replaced or repinned Dual ball bearing locking mechanism resists pulling & prying Double ball bearing locking system Supplied with 2 keys Keyed to Differ