The Oxford monster chain and the padlock have a 14mm hexagon chain of Ni-Cro-Mo steel and are provided with a protective cover to protect their paint.The ultra-high padlock has a hardened shores housing, a hardened steel hardened 11 mm thick and comes with three keys.Key Exchange Service Available. Just keep the key number in a safe place, and if you unfortunately have lost all the keys, a replacement key can be made up for you.The chain lock was strictly tested both independently and by Oxford and is sold as safe and approved by Thatcham.It is available in three lengths:Of16 1.2mOf17: 1.5mOf18: 2.0mchain14mm hex chainNi-Cro Molloy steel.Protective sleeveCan easily be stowed under the seatpadlockUltra-strong padlock made of hardened shores armor housing.Double locking mechanismDust cover with sliding buttonThree keys and key exchange service