7mm thick, hexagonal chain links made of extra-hard 3t manganese steel form a chain with a length of 85cm and provide optimum protection. A reinforced high-security disc cylinder lock protects against picking and drilling. The new "Integrated Chains" system from Kryptonite offers even less surface area for attack, since the chain and its links are directly connected to the locking cylinder and no longer represent an external part. A weatherproof nylon cover protects your bike from scratches and allows a compact folding of the chain. Chain lock with security level 5.