Kryptonite Evolution Series 4 1016 Integrated ChainThe Kryptonite Evolution Series 4  1016 Integrated Chain Lock features a maximum-security design and is equipped  with an Evolution series 4-Lock head and is rated Sold Secure GOLD.Increased ProtectionThe Evolution Series 4 Integrated  Chains provide convenient bicycle protection in moderate to high crime areas.  Made from triple heat-treated, hardened boron manganese steel and include 10mm  six-sided links to increase protection against cutting attacks by damaging  cutting tools. This chain features a market leading, integrated Evolution  series 4 lock head padlock system. This new, revolutionary chain design also  features a patent-pending pin-less locking mechanism, which secures the chain  to a hardened deadbolt to ensure there is no weak leak in the system due to  extensive holding power placed upon the link itself against attacks.Features:  Material: Chain: 3T Manganese Steel; Keys: Stainless Steel  Security Rating: Sold Secure GOLD  Chain Diameter: 10mm, six sided  Locking Mechanism: Disc-Style cylinder, End Link Design  Protection: Weather Resistant Nylon Sleeve  Keys: 3x "I" design (1x LED light equipped)  Dimensions: 160cm chain length  Weight: 4.4kgBuy Kryptonite Accessories from Chain Reaction Cycles, the World's Largest Online Bike Store.