The OnGuard Mastiff 3.5 ft Chain Lock delivers serious protection for bikes, scooters, and e-bikes in medium-to-high risk environments. The 110 cm (3.57 ft) chain is built with titanium-reinforced hardened steel hex links designed to resist cutting, prying, and leverage attacks. The chain integrates directly into a heavy-duty X2P Double Bolt Lock Head, securing both sides of the locking mechanism for exceptional pull resistance. A dual rubber housing helps protect frames and finishes from scratches while also improving durability and weather resistance. The advanced Z-Cylinder core adds protection against bumping, drilling, and picking attempts for dependable long-term security. Designed for riders who want strong yet manageable protection, this chain lock offers an ideal balance of durability, portability, and everyday convenience. Includes five precision laser-cut keys.

• High-Security X2P Lock Head: Integrated X2P Double Bolt mechanism locks both sides for superior resistance against pulling, twisting, and prying attacks.
• Heavy-Duty 10 mm Steel Chain: Titanium-reinforced hardened steel hex links provide strong defense against cutting, leverage, and impact attacks.
• Practical 110 cm Locking Length: 110 cm (3.57 ft) chain length provides flexible locking options around racks, poles, and fixed urban objects.
• Advanced Z-Cylinder Protection: Precision locking core resists bumping, drilling, and picking for dependable anti-theft performance.
• Complete Key Set Included: Comes with five laser-cut keys.


Manufacturer Sku: 8020
Todson Sku: 45008020