The kryptonite kryptolok s2 955 lock with integrated chain include 9mm four sided chain links made from triple heat treated boron manganese steel the chain secures with a new patent pending integrated kryptolok series 2 lock head with talon deadbolt the innovative chains also include a new patent pending pin less link design which allows for no weak link in the chain chains are enclosed in a nylon webbing sleeve to protect paint from scratches and allow for compact coiling while transporting