OnGuard Brute STD U-Lock – 16.8 mm (0.66 in) Hardened Steel Bike Lock, 115 mm × 202 mm (4.53 in × 7.96 in) Interior Dimensions, X4P Quad Lock Mechanism with Mount Bracket

The OnGuard Brute STD U-Lock delivers elite-level bike security for riders parking in high-risk urban environments. Built with a massive 16.8 mm (0.66 in) hardened steel TriRadius shackle and the advanced X4P Quad Lock system, the lock secures the shackle on four sides to resist cutting, twisting, prying, and leverage attacks. Its balanced shackle size provides strong security while remaining portable for daily commuting. The rubber-coated shackle and co-molded crossbar help protect bike frames from scratches and corrosion. Includes five precision laser-cut keys, and a universal mounting bracket for convenient on-bike transport.

• X4P Quad Lock Security: Four-sided locking mechanism secures the shackle at multiple points for maximum resistance to pulling, prying, and leverage attacks.
• 16.8 mm (0.66 in) Hardened Steel Shackle: Massive TriRadius hardened steel construction provides exceptional defense against bolt cutters and saw attacks.
• Balanced Locking Dimensions: 115 mm × 202 mm (4.53 in × 7.96 in) interior space provides secure fit around racks, posts, and bike frames while maintaining portability.
• Rubber-Coated Protection: Co-molded crossbar and protective coating 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 bike transport and everyday convenience.