The OnGuard Mastiff 6 ft Chain with Integrated Key Lock provides dependable heavy-duty protection for bicycles, e-bikes, scooters, and motorcycles in higher-risk environments. The 180 cm (6 ft) chain features titanium-reinforced hardened-steel square links designed to resist cutting, sawing, and leverage attacks. Its integrated lock head uses OnGuard’s X2P Dual Lock Down mechanism to secure both sides of the shackle for improved resistance against pulling and twisting attempts. A co-molded lock body and metal endcaps add durability and help absorb impacts, while a protective sleeve helps prevent scratches and shields the chain from corrosion and weather exposure. An automatic keyway cover helps keep dust and moisture out of the lock cylinder for smooth long-term operation. Includes five precision laser-cut keys.

• X2P Dual Lock Security: Integrated lock head secures both sides of the shackle to resist pulling, twisting, and prying attacks.
• Titanium-Reinforced Chain Strength: 180 cm (6 ft) hardened-steel square-link chain engineered for superior resistance to cutting and leverage attempts.
• Heavy-Duty Integrated Lock Design: Built-in lock head eliminates weak points while improving durability and ease of use.
• Protective Weather-Resistant Sleeve: Durable cover helps protect frames from scratches and shields the chain from corrosion and outdoor wear.
• Complete Key Set Included: Comes with five precision laser-cut keys.


Manufacturer Sku: 8021
Todson Sku: 45008021