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