Kryptonite New York Fahgettaboudit 1410 Chain and New York Disc Bike Lock, 14mm x 39" 14mm six-sided chain links made of3t HARDENED MANGANESE STEELfor ultimate strength Durable, protective nylon cover with hook-n-loop fasteners to hold in place Includes maximum security New York Disc Lock with 15mmMAX-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 STEEL KEYS one lighted with high intensity bulb and replaceable battery Key Safe Program Product dimensions: 3.25 (100cm) chain length, 15mm shackle diameter 14mm six-sided chain links made of 3t hardened manganese steel for ultimate strength Durable, protective nylon cover with hook-n-loop fasteners to hold in place Includes maximum security New York Disc Lock with 15mm 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