Mastiff Chain Lock Combo (120CM X 6MM)

The OnGuard Mastiff 120 cm Combo Chain Lock delivers robust, keyless security in a versatile design built for urban cyclists and commuters. Its 1195 mm (47 in) titanium-reinforced, hardened-steel square links resist cutting, sawing, and leverage attacks, offering reliable protection for bikes, e-bikes, and scooters. The durable Steel Ball Combo mechanism features a user-settable 4-digit combination, eliminating the need for keys while maintaining tamper resistance. A rugged 30 mm (1.2 in) nylon sleeve prevents scratches to frames and components, while the weather-resistant housing ensures long-lasting performance in all conditions. Compact enough for daily use yet strong enough for high-risk environments, the Mastiff Combo Chain is trusted by riders seeking durable, convenient, and portable protection.

• Maximum Durability: 6 mm titanium-reinforced hardened steel square links provide outstanding resistance against cutting, pulling, and prying attacks for long-lasting peace of mind.
• Keyless Convenience: User-settable 4-digit Steel Ball Combo system eliminates keys while offering secure, easy-to-reset protection that resists tampering and accidental resets.
• Protective Nylon Sleeve: Heavy-duty 30 mm nylon fabric cover prevents scratches, protects bike paint, and minimizes noise while riding or carrying the lock.
• Compact Yet Strong: Measures 1195 mm (47 in) for flexible locking around poles or multiple bikes, combining portability with serious strength for urban commuters.
• Anti-Theft Assurance: Includes OnGuard’s comprehensive anti-theft protection program, reinforcing its reputation as one of the toughest chain locks in its class.


Manufacturer Sku: 8123
Todson Sku: 45008123