Keep your cool with Kryptonite’s Keeper 512 Combo Cable Bike Lock. This lightweight pre-set combination lock is very easy to use. The flexible steel cable is braided for extra cut resistance. It measures 5mm in diameter and 4 feet in length and self-recoils to keep your bicycle safe. Additionally, the steel cable has a vinyl finish to preserve your bike’s paint job (no scratching!). This lock comes highly recommended for quick release components. Feel secure locking your bike and accessories up with a Kryptonite lock.