Kryptonite New York Noose 1213 Bicycle Chain Lock 12mm six-sided, chain links made of3tHARDENED MANGANESE STEELfor maximum strength CINCH LOOPfor effective lock-ups using less chain Offers nearly the same in-use length as a traditional 5.5 chain, which means less bulk to carry Durable, protective nylon cover with hook-n-loop fasteners to hold in place Includes Evolution series 4 Disc Lock with 14mmMAX-PERFORMANCE STEEL SHACKLE HIGHER SECURITY DISC-STYLE CYLINDERwith reinforced anti-drill, anti-pull protection system Patented*, oval hardenedSTEEL CROSSBARfor extra security HardenedDOUBLE DEADBOLTlocking for extensive holding power SLIDING DUSTCOVERprotects and extends cylinder life 3 STAINLESS STEEL KEYS one lighted with high intensity bulb & replaceable battery 12mm six-sided, chain links made of 3t hardened manganese steel for maximum strength Cinch loop for effective lock-ups using less chain Offers nearly the same in-use length as a traditional 5.5 chain, which means less bulk to carry 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 Higher security disc-style cylinder with reinforced anti-drill, anti-pull protection system Patented*, oval hardened steel crossbar for extra security Hardened double deadbolt locking for extensive holding power Sliding dustcover protects and extends cylinder life 3 keys  one lighted with high intensity bulb & replaceable battery