The OnGuard Bulldog STD U-Lock delivers dependable everyday security for commuters and city cyclists. Its 13 mm hardened-steel shackle resists cutting and leverage attacks, while the X2P Double Bolt mechanism secures both sides of the shackle for enhanced strength. The Z-Cylinder core protects against picking, drilling, and bumping for long-term reliability. A rubber-coated crossbar and endcaps protect bike paint from scratches, and the included mount bracket makes carrying easy. Dimensions: locked length 275 mm (10.8 in), width 175 mm (6.9 in), crossbar thickness 35 mm (1.4 in). Includes five laser-cut keys (one LED).