A lightweight integrated chain in the Keeper line of Kryptonite security products The Keeper Integrated Chain is a hardened triple heat-treated boron manganese steel chain made with 7 mm four-sided links The Keeper Integrated Chain secures with a new integrated lock head Chain links are enclosed in a nylon-webbing sleeve to protect paint from scratches End pin-link design secures the chain with the hardened deadbolt Offers great holding power against attacks High security disc-style cylinder is pick and drill resistant Recommended for use in low crime areas Comes with 2 ergonomic 'I' keys The new 'I' key makes opening a disc-style cylinder much smoother 85 cm Length Approved to bicycle Silver Sold Secure standard