Kryptonite New York Chain 1210 Bicycle Lock with Evolution Series-4 14mm Bike Disc Lock 12mm six-sided, chain links made of3T HARDENED MANGANESE STEELfor maximum strength Durable, protective nylon cover with hook-n-loop fasteners to hold in place Includes Evolution series 4 Disc Lock with 14mmMAX-PERFORMANCE STEEL SHACKLE Patented*, oval hardenedSTEEL CROSSBARfor extra security HardenedDOUBLE DEADBOLTlocking for extensive holding power HIGH SECURITY DISC-STYLE CYLINDERwith reinforced anti-drill, anti-pull protection system SLIDING DUSTCOVERprotects and extends cylinder life 3 STAINLESS STEELKEYS one lighted with high intensity bulb and replaceable battery Product dimensions: 3.25 (100cm) chain length, 14mm shackle diameter 12mm six-sided, chain links made of 3t hardened manganese steel for maximum strength Durable, protective nylon cover with hook-n-loop fasteners to hold in place Includes Evolution series 4 Disc Lock with 14mm MAX-Performance steel shackle Patented*, oval hardened steel crossbar for extra security Hardened double deadbolt locking for extensive holding power High security disc-style cylinder with reinforced anti-drill, anti-pull protection system Sliding dustcover protects and extends cylinder life 3 stainless steel keys  one lighted with high intensity bulb and replaceable battery Key Safe Program