The Kryptonite Evolution chain lock is probably the highest security chain lock from Kryptonite that can still be described as truly portable.

• The Evolution Series 4 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
• Comes with 3 stainless steel keys including a lighted LED key with replaceable battery and 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
• Approved to Thatcham CAT3