The American Lock A5530 delivers industrial-grade security with a solid brass construction that withstands extreme corrosion in harsh outdoor and chemical environments. Its hardened boron alloy shackle resists cutting attacks, while dual stainless steel ball bearings prevent pulling and prying attempts. The rekeyable 5-pin APTC12 brass cylinder with serrated pins offers exceptional pick resistance and thousands of potential key combinations, making it ideal for facilities requiring both durability and flexibility in access control.