The Kryptonite Evolution 4 1055 Chain Lock with Integrated Chains are for convenient bicycle protection in moderate to high crime areas. The hardened triple heat-treated boron manganese steel chains include 10mm six-sided links. The integrated chains secure with a new patent-pending integrated Evolution series 4 lock head. This innovative series of chains also feature a patent-pending pin-less design which secures the chain to a hardened deadbolt and allows for no weak leak in the chain due to extensive holding power of the link itself against attacks. Chains are enclosed in a nylon-webbing sleeve to protect paint from scratches and allow for easy portability and tight coiling during storage.