Kryptonite Evolution Series 4 Disc

14mm hardened Max-Performance steel shackle resists cutting 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 keeps the bunnies out 3 Keys - one lighted with high intensity bulb and replacablebattery Key safe program 8/10 Security Rating