ONGUARD Mastiff Chain Lock with Keys: 3.7' x 10mm

This OnGuard Mastiff Chain Lock is made of 10mm ultra-hardened, titanium-reinforced hexagonal steel links with a 13mm padlock.

This lock is heavy duty. With a 92 out of 100 security rating, you'll be able to know your bike is secure. The quattro bolt locking mechanism provides unqualed strength and maximum pull resistance by locking the cross bar to the shackle on 4 sides. 

It's got a new user-friendly, pick, pull and drill resistant ongard z-key cylinder featuring bumpblock, offers optimum deterrant against physical attack. 

⋅ Includes 5 laser-cut keys, (1 micro-light and 4 extra grip keys). The micro-light key projects a bright white beam. 
⋅ 10mm links with 13mm padlock and includes $3,001 anti-theft protection *not valid in the state of New York... sorry NY.
⋅ Water and Heat resistant embroidered chain cover with velcro closures 
⋅ Dimensions: 3.7 feet x 10mm in diameter


  • Advertised Weight: 7.485lbs
  • Diameter: 10 mm
  • Length: 94 mm
  • Lock Style: Padlock
  • Dimensions: 3.7" x 10mm in diameter

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