The Keeper 785 is a heavy duty chain lock designed to thwart the most determined urban thieves. Kryptonite’s 785 chain features in a features a lock mechanism that’s built directly into the links itself. This design eliminates a critical weak point found on traditional chain locks which are secured by padlocks. The 7mm four-sided links made from 3t manganese steels for bombproof security. The included Nylon covers protects your bike’s paint and the ample 85cm 33.5 length makes it easy to lock up wheels and accessories too.