ONGUARD 8021 Mastiff 6-Foot x 3/8-Inch Heavy Duty Quad Bike Chain Lock - Secure Bicycles, Motorcycles, Scooters & Outdoor Equipment

The Mastiff series offers cyclists and power sports enthusiasts more high security options in a lighter, more compact package. 10mm hex-link chains and square section bar links resist attack from saws and cutters. Quattro and dual lock mechanisms feature dual lock down protection and 4 laser-cut plus 1 TorchKey. All locks have vinyl coated large diameter ultra-hardened steel shackles and rubber coated end caps. Nylon chain covers help protect painted surfaces. Backed with an anti-theft protection program.

X2 double bolt locking mechanism

Titanium enforced, square steel chain links provide maximum cut resistance

Unique OnGuard cylinder offers optimum resistance against physical attack and picking

Reinforced sleeve over crossbar and cylinder for additional security

Water and heat resistant chain covers prevents scratching and allows compact coiling; Rotating dust cover protects cylinder