The Kryptonite Keeper 712 integrated chain lock features 7mm four-sided chain links made from 3t manganese steel. Patent-pending end link design secures the chain to a hardened deadbolt eliminating critical vulnerability and providing extra holding power. High-security disc-style cylinder is picked and drill-resistant; resists most common hand tools. A durable weather-resistant nylon sleeve prevents scratches to painted finishes and protects the chain against the elements.
 
Features:
Patent-pending end link design secures chain to hardened deadbolt eliminating critical vulnerability
End link design secures the chain to a hardened deadbolt offering no weak links in the chain.
Fabric-covered chains protect your bicycles paint from scratches and abrasions
An integrated end-link locking point eliminates the need for a separate lock when using the chain
Includes 2 new ergonomic "I" keys