A popular shackle length with X2P Double Bolt protection combined with improved user settable steel ball click-combo lock system. OnGuard’s bestselling U-locks featuring best-in-class X2P Double Bolt lock mechanisms and super strong 13mm (0.51”) hardened steel shackles for a full circle of protection. 4 number combination to be set by user (instructions included) Shackle dimensions: 115mm x 230mm x 13mm (W x H x Diam) Key Features: X2P Double Bolt Locking Mechanism locks shackle on both sides, NEW Z-Cylinder is bump-proof and resists picking, pulling or drilling, Hefty 13mm (0.51”) hardened steel shackle resists cutting, prying and jacking, Rounded design and centred keyway eliminates pry points, Double rubber coated crossbar cover protects paint and finishes, Extra thick moulded end caps protects against bumps and hits, .