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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 ergonomic keys
AmazonThe bicycle lock measures 85cm in length and weighs 1.6kg; This Kryptonite bicycle lock is a sturdy, flexible and compact chain lock New end link design secures chain to hardened deadbolt Hardened Deadbolt Dedsign Provides Extra Holding Power