Kryptonite Evolution Series 4 Integrated Chain Bike Lock

The Evolution series 4 Integrated Chain is a great high security bike lock option. 10mm sixsided chain links made from 3t manganese steel Patentpending end link design secures chain to hardened deadbolt eliminating critical vulnerability High security discstyle 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