Bicycle chain lock that offers the strength of a U-lock with the portability of a cable lock. At 3-feet long, the chain can wrap through the frame and front wheel, securing the most vulnerable features of the bicycle. Heavy-duty 6mm diameter hardened steel links provide meaningful protection against thieves while the woven nylon sleeve prevents damage to a bicycles paint. Includes two standard keys which can be registered online after purchase. In the event keys are lost, Bell will send replacements at no charge. An independent lab has rated the security of this lock a 3 on a 5 point scale. Perfect for locking bikes, lawn furniture, or other large valuable items in low medium crime areas.