The Chain 10 has a key replacement service. When you buy your Chain 10, simply note down the number which comes attached to the keys on a metal tag. Keep this in a safe place, then in the event that you are unfortunate enough to lose all your keys, it will be possible to get a new key made up for you.  This Chain 10 has undergone rigorous independent testing and has Sold Secure Pedal Cycle GOLD.Key FeaturesSold Secure Pedal Cycle GOLDHeavy duty chain lock with a flexible cloth sleeve to protect paintworkTough double locking padlock with hardened steel shackleKey dust coverThree high security keys includedDimensionsChain - 10mmsquare chain, 1.4m lengthPadlock - 11mmshackle, 95mm(h) x 70mm(w)