Kryptonite Evolution Series 4 1016 Integrated Chain Evolution Series 4 1016 Integrated Chain Lock with 10mm six-sided chain links made from 3t manganese steel and patent-pending end link design secures chain to hardened deadbolt eliminating critical vulnerability.The Kryptonite Evolution Series 4 1016 Integrated Chain Lock is a flexible, compact and easy to use deterrent security.Anti- Theft Protection: US & Canada Bicycle $2,250; US & Canada Powersport $750; UK Bicycle 1,000 10mm six-sided chain links made from 3t manganese steelPatent-pending end link design secures chain to hardened deadbolt eliminating critical vulnerabilityHigh security disc-style cylinder is pick and drill resistantPatented, reinforced oval crossbar lock headSliding dustcover protects and extends cylinder life3 stainless steel keys ? one LED lighted key with replaceable battery and 2 new, ergonomic ?I? keysDurable weather-resistant nylon sleeve prevents scratchesKey Safe ProgramProduct Dimensions: 5.25? (160cm) chain lengthProduct Weight: Product weight: 9.70 lb s (4.40 kgs)Model Number: 000815