The Loop Lock is a high tensile, self-coiling cable. It comes in two sizes 15mm diameter with a mini shackle (LK221) and 10mm diameter with a padlock (LK222). The Oxford Loop Lock 15 & 10 has a key replacement service. When you buy your Loop Lock 15 or 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.