The abus steel o chain 5805k keyed chain lock with our 5805 chains we offer the perfect solution to secure low priced bicycles a 5mm strong square hardened steel chain protects it and of course looks good form fit design and the variety of black blue red or lime fabric sleeves is waiting for your decision security level 4 for combo with individual resettable code security level 5 for key including two keys abus steel o chain 5805k keyed chain lock features 5mm strong square hard