The Keeper 785 Integrated Chain has 7mm four-sided chain links made from 3t manganese steel. With a Kryptonite security rating of 5/10 it offers moderate bike security in high theft areas. FEATURES: 7mm four-sided chain links made from 3t manganese steel Patent-pending end link design secures chain to hardened deadbolt eliminating critical vulnerability Hardened deadbolt design provides extra holding power High security disc-style cylinder is pick and drill resistant Includes 2 new ergonomic "I" keys Durable weather-resistant nylon sleeve prevents scratches Key safe program Optional Anti-theft Protection Offer of up to $500 should you decide to register for coverage at www.kryptonitelock.com (additional costs may apply) SPECS: Product dimensions: 33.5” (85cm) chain length Product weight: 3.50 lbs (1.59 kgs)