Kryptonite Evo Lock: Offering a higher level of security for locking your Murf anywhere you go, the Kryptonite Evolution integrated chain lock features 10 mm 6-sided chain links made from 3T manganese steel. 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 $3,000 in the event your Murf is stolen due to the opening or breaking of the lock by force.  10 mm 6-sided chain links made from 3T manganese steel Patent-pending end link design secures chain to hardened deadbolt, eliminating a critical vulnerability High-security disc-style cylinder is pick and drill resistant; a sliding dustcover protects and extends cylinder life Patented reinforced oval crossbar lock head Includes 3 stainless-steel keys: 1 LED lighted key with replaceable battery and 2 ergonomic "I" keys Durable weather-resistant nylon sleeve over the chain prevents scratches Key Safe Program & Anti-Theft Protection up to $3,000 Product dimensions: 35.5” (90cm) chain length Product weight: 6.10 lbs (2.77 kgs)