ABUS 83CS/50-300 S2 Schlage 50mm Rekeyable Padlock All Weather Solid Brass Chrome Plated Body, 1-Inch Closed Shackle, Zero-Bitted Extreme corrosion resistant plating Shackle made from hardened steel Double bolted: both sides of the shackle are secured by bolts or balls- increased protection against attacks and manipulation Master key available Shackle Guard: access restricted, protecting shackle from attack