The mechanical copiers have never been the best way to copy a key. Each key manufacturer has a fixed set of depths to cut each position on the key at, which yo

The mechanical copiers have never been the best way to copy a key. Each key manufacturer has a fixed set of depths to cut each position on the key at, which you can represent as a single digit. Combined for the whole key and you can talk about the data encoded into the piece of metal as a string of digits. Telling you my apartment key is a kwikset KW1 with bitting 64265 is enough to cut a new key.