Kryptonite - EVOLUTION SERIES 4 1055 MINI Integrated Chain 21

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, ergonomic "I" keys
Durable weather-resistant nylon sleeve prevents scratches
Key Safe Program
Dimensions: 21in
Security Rating: 8/10
US$3000 ATPO