There may come a time when you need to have your locks replaced, but you've lost or misplaced the original set of keys. Don't worry. A skilled and highly trained locksmith should be able to make a key without gaining access to the original copy.
To do so, a locksmith may use any of the following methods:
Get the lock impression: By getting the impression of the lock, the locksmith can create a key that can effectively access it. Of course, for this to work, the locksmith must have excellent attention to detail.
Use the key codes: Often, keys have two key code types, the blind code and the bitting code. These are dispersed to different key locks and models. Therefore, without having physical access to the original key, the locksmith can create a new key using the specified code.
Disassemble the lock: This third and final method combines the previous two techniques. The locksmith will first get the impression of the lock by disassembling the system and then work out the specific key code to create a new key that fits perfectly with the existing lock.