The OnGuard Mastiff 4.2 ft Chain with X4 Padlock offers strength and versatility with a 1170 mm (46.1 in) titanium-reinforced hardened-steel chain. Its unique cinch-loop design allows efficient use of length for tight locking setups. The Boxer U-lock with X4P Quad Lock secures on four sides to eliminate pry points, while the Z-Cylinder resists picking and drilling. Rubber coatings protect paint and finishes. Includes five laser-cut keys (one with LED light) for everyday reliability. Compact strength: 1170 mm (46.1 in) titanium-reinforced chain with cinch-loop design maximizes reach while maintaining portability for commuters. Advanced locking: Boxer U-lock uses X4P Quad Lock to secure on four sides, blocking prying, twisting, and leverage attacks in high-risk areas. Heavy-duty links: 10 mm hardened-steel hex links resist cutting and impact for long-lasting, all-weather security. Tamper-proof core: Z-Cylinder resists bumping, picking, and drilling to ensure dependable protection against forced entry. Keys and bracket included: Comes with five laser-cut keys (one with LED light) and protective coatings for daily durability.