The Master Chrome Plated Zinc Padlocks provide great resisitance against corrosion. It has a harden shackle to resisit cutting & for added security, these high security padlocks are great for use out doors. Solid zinc, die-cast lock body with chrome plating to resist corrosion Hardened boron alloy shackle to resist cutting Removable cylinder can be replaced or repinned 5-pin tumbler cylinder for added security More than 9, 000 key changes available for maximum pick resistance Double locking deadbolt shackle to resist prying Supplied with 2 keys