The Kryptonite New York Chain Lock features a heavy duty chain to keep any bike safe. SPECIFICATIONS & FEATURES 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 Product dimensions: 3.25&&';; (100cm) chain length 14mm shackle diameter Product weight: 8.65 lbs (3.92 kgs)