OnGuard Mastiff Chain Bike Lock with Keys: 3.7' x 10mm, Black

OnGuard's Mastiff Chain delivers protection for your bike in high-risk areas. Its hardened 10mm square link chain resists attacks from saws and cutters while the burly lock uses OnGuard's X2 dual-lockdown design to protect against picking pulling and bumping. This lock comes with five keys including one with a built-in light.

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Accessories - Hart's Cyclery, Pennington, NJ