Non-rekeyable cylinder, laminated steel body for superior strength Hardened boron alloy shackles for extra cut resistance Proprietary rustproofing for longer life Commercial grade padlock features superior protection from drilling and prying Dual ball bearings locking for maximum pry resistance making it ideal for industrial applications Choose between Keyed Different (KD), Master Keyed (MK), Master Keyed/Keyed Alike (MKKA), and Universal Pin (UP) Full range of sizes to best secure your applications Assorted bumper colors available.