The Kryptonite Keeper 785 is a solid chain lock for use in low to medium crime areas and great as a secondary lock to your main system to be a further deterrent. As a testament to its performance the Keeper is Bronze Sold Secure ratedinsurer friendly.The Keeper 785 chain is made from hardened triple heat-treated boron manganese steel constructed with 7mm links - it's impressively tough.A hardened deadbolt gives the chain lock great holding power while the disc-style cylinder keyway is both pick and drill resistant.Key Features: 7mm four-sided chain links made from 3T manganese steelPatent-pending end link design secures chain to hardened deadbolt eliminating critical vulnerabilityHardened deadbolt design provides extra holding powerHigh security disc-style cylinder is pick and drill resistantIncludes 2 new ergonomic "I" keysDurable weather-resistant nylon sleeve prevents scratchesKey safe programProduct dimensions: 85cm chain lengthProduct weight: 1.59 kgs