Kryptonite Keeper Lock - A flexible locking solution with 7 mm hardened steel links, the Kryptonite Keeper is a lightweight chain lock that's great for securing your Murf anywhere you go. Register your key number with Kryptonite for easy replacement of lost or worn keys for a minimal fee. Also includes an Anti-Theft Protection Offer through Kryptonite that reimburses registered customers for up to $500 in the event your Murf is stolen due to the opening or breaking of the lock by force. 7mm four-sided chain links made from 3T manganese steel Patent-pending end link design secures chain to hardened deadbolt eliminating critical vulnerability 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 & Anti-Theft Protection up to $500 Product dimensions: 47” (120cm) chain length Product weight: 3.75 lbs (1.70 kgs)