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 low to moderate crime areas.Comes with 2 ergonomic 'I' keysThe new 'I' key makes opening a disc-style cylinder much smootherUniquely designed end-link moulded covers, which allow ease of holding the end-link while locking and unlocking; also prevents the nylon cover from sliding