Kryptonite Evolution Series 4 Bicycle Disc Bike Lock (Black) , 14 Millimeter

14mm hardened MAX-Performance steel shackle resists both cutters and leverage attacks. Double deadbolt locking mechanism has extensive holding power. High security, disc-style cylinder with reinforced anti-drill, anti-pull protection system. Sliding dust cover protects and extends cylinder life. 3 stainless steel keys -- one lighted with high intensity bulb & replaceable battery. Key Safe Program.