OnGuard Secure Products

OnGuard bicycle, motorcycle, and powersports locks offer optimal security with the latest technological innovations, quality construction, and ease-of-use all at a great price. You'll enjoy all that the premium brands offer at a significant savings, giving you more for less. Great for commuters, students, and families, OnGuard delivers the meanest locks at the nicest price.

Onguard Mastiff 8021 Bike Chain Lock 180cm x 10mm

The OnGuard Mastiff 8021 comes equipped with a longer 6' 10mm titanium reinforced hardened square link chain with X2P Dual Lock down head. Hexagonal and square links present more hardened surfaces than round links making sawing and cutting virtually impossible. Titanium surface hardening vastly increase cut and saw resistance. Embroidered nylon chain covers wont crack or peel for long lasting beauty. Velcro tabs keep cover in place to help protect paint and finishes.


  • Chain dimensions: 180cm x 10mm.
  • OnGuard Security Rating: 78/100.
  • Sold Secure rating: Bronze.
  • Bump proof Z-Cylinder.
  • 100mm titanium enforced hardened square steel chain.
  • Drilling, picking and high pull resistant with double bolt locking mechanism.
  • Automatic keyway covers helps seal lock internals against the elements.
  • Includes 5 laser cut keys, 1 with Micro LED .
  • Water and heat resistant embroidered chain cover with velcro closures.
  • Anti-theft guarantee of £1500.
  • Weight 4.6kg (inc keys).