Mastiff 4.2' Chain with X4 Padlock

The OnGuard Mastiff 4.2 ft Chain with X4 Padlock delivers strong, versatile protection with a heavy-duty titanium-reinforced hardened steel chain and compact Boxer padlock. The 130 cm (4.22 ft) chain features rugged 10 mm hexagonal links engineered to resist cutting, prying, and leverage attacks in urban environments. Its unique cinch-loop design allows riders to maximize locking efficiency by tightening the chain around racks, poles, or bike frames for a more secure setup. The included Boxer U-lock padlock uses the X4P Quad Lock mechanism to secure the shackle on four sides, eliminating weak points and resisting twisting or pulling attacks. An advanced Z-Cylinder core provides added defense against picking, drilling, and bumping attempts. Durable protective coatings help prevent scratches on frames and finishes, while the included key set ensures convenient daily use. Includes five laser-cut keys.

• Efficient Cinch-Loop Design: 130 cm (4.22 ft) chain uses a cinch-loop system to maximize locking reach while reducing excess slack for tighter security.
• X4P Quad Lock Protection: Boxer padlock secures the shackle on four sides to resist twisting, prying, and pulling attacks.
• Heavy-Duty 10 mm Hex Links: Titanium-reinforced hardened steel chain links provide strong resistance against cutting and leverage attacks.
• Advanced Z-Cylinder Security: Precision cylinder helps resist bumping, drilling, and picking attempts for dependable anti-theft protection.
• Complete Security Kit: Includes five laser-cut keys and protective coatings to help protect bike frames and finishes.


Manufacturer Sku: 8019LP
Todson Sku: 45008019LP