Kryptonite Evolution Series 4 Integrated Chain Bike Lock

The Evolution series 4 Integrated Chain is a great high security bike lock option. 10mm six-sided chain links made from 3t manganese steel Patent-pending end link design secures chain to hardened deadbolt eliminating critical vulnerability High security disc-style cylinder is pick and drill resistant Patented*, reinforced oval crossbar lock head Sliding dustcover protects and extends cylinder life 3 stainless steel keys – one LED lighted key with replaceable battery and 2 new