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.