Onguard Mastiff Integrated Key Chain Lock Black 3.57' X 0.39"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