OnGuard Pitbull Mini U-Lock – 14 mm (0.55 in) Hardened Steel Bike Lock, 90 mm × 140 mm (3.55 in × 5.52 in) Interior Dimensions, X4P Quad Lock Mechanism with Mount Bracket

The OnGuard Pitbull Mini U-Lock delivers high-security bike protection in a compact design ideal for commuters and urban riders. Built with a 14 mm (0.55 in) hardened steel shackle and the advanced X4P Quad Lock system, the lock secures on four sides to resist cutting, prying, twisting, and leverage attacks. Its compact interior dimensions of 90 mm × 140 mm (3.55 in × 5.52 in) minimize leverage space while still allowing flexible locking around racks, posts, and bike frames. A rubber-coated crossbar and protective shackle sleeves help prevent scratches on bike finishes and components. Includes five precision laser-cut keys, and a universal mounting bracket for convenient on-bike transport.

• Compact Anti-Leverage Security: 90 mm × 140 mm (3.55 in × 5.52 in) interior dimensions reduce leverage opportunities while securely locking bikes to racks or posts.
• 14 mm (0.55 in) Hardened Steel Shackle: Heat-treated hardened steel construction resists cutting, sawing, and leverage attacks in urban environments.
• X4P Quad Lock Mechanism: Four-sided locking system secures the shackle at multiple points to resist twisting, pulling, and forced separation.
• Rubber-Coated Protection: Co-molded crossbar and protective sleeves help prevent scratches and corrosion on bike frames and components.
• Complete Security Kit: Includes five laser-cut keys and a universal mounting bracket for easy on-bike transport.