1-15/16 wide. Titanium Tough reinforced for high-tech strength. Stainless steel body with integrated high impact ABS bumper. Bolt cutter tough shrouded hardened steel shackle. Crowbar resistant rotary shackle defies prying. Gear driven shackle. Sliding keyway cover keeps dirt and grime from mechanism. Front access keyway. 5/16″ diameter shackle. Shackle clearances: vertical 5/8″, horizontal 5/8″. Black with green bumper. With two keys. Keyed differently.