Key Space and Depth
You can use space and depth keys to cut a key to code / repair a key / calibrates your key machine / as a key gauge.
When you have a full set of space and depth keys, it's easy to cut a key to code using a standard key duplicating machine.
If you find you have a key that is worn out, you can measure the original key against the space and depth key to work out what the correct height should be.
Damaged keys that are broken can also be repaired with space and depth keys, allowing you to use the space and depth keys in the broken area of the key.
Space and depth keys are an essential for all Lock Shop's and locksmiths that make keys from locks,
key cutters that duplicate keys over the counter should have space and depth keys to help repair broken keys and increase their services offer.