The Kryptonite Evolution 1090 Integrated Chain Lock is Sold Secure Gold. The Evolution Series 4 Integrated Chains are for bicycle protection in moderate to high crime areas. It measures 10 MM X 90 CM. The hardened triple heat-treated boron manganese steel chains include 10mm six-sided links. The chain is enclosed in a nylon-webbing sleeve to protect paint from scratches & allow for easy portability & tight coiling during storage. Features 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 & allows for no weak leak in the chain due to extensive holding power of the link itself against attacks Comes with 3 stainless steel keys including a lighted LED key with replaceable battery & 2 new, ergonomic I keys One key is lighted for easy access at night; replaceable battery insures that light can be used as long as the lock. The new I keys make opening a disc-style cylinder much smoother Approved to Gold Sold Secure standard