OnGuard Pitbull Series - Standard U-Lock Keyed - 11.5cm x 23cm D 14mm Description Superior protection for medium to high crime areas. X4P Quattro Locking Mechanism for four-sided protection. Hefty 14mm hardened steel TriRadius shackle resists cutting, prying and jacking while providing more internal space for locking versatility Crossbar and shackle coatings protect finishes. provide increased locking versatility for securing bicycles and scooters. Features X4P Quattro Bolt Locking Mechanism locks shackle on four sides Z-Cylinder is bump-proof and resists picking, pulling or drilling TriRadius shackle creates more internal space for locking versatility Hardened steel shackle resists cutting, prying and jacking Rounded design and centered keyway eliminates pry points Co-molded crossbar cover and double rubber coated shackle protects finishes All-metal end caps provide additional protection against hits and drops Automatic keyway covers helps seal lock internals against the elements 1 micro-light and 4 extra grip laser cut keys Micro-light key projects a bright white beam.