Sentry S320 Series Ball Bearing Iron Padlock Features: • 4 Disc Mechanism Iron Keys • Iron Lock Body and Nickel Plated • Brass Discs and Disc Shells • Brass Cylinder • ISO 9001-2015 • Hardened Shackle • Anti -Sawing • Anti-Cutting • Anti-Pick • Anti-Corrosion • Outdoor Environment Model SKU & Sizes: • S340.40 40mm • S340.50 50mm • S340.60 60mm