Master Lock key boxes are designed to provide a secure way to store keys, but what happens if you lose the code or forget the combination? There are a few different ways to open a Master Lock key box without the code.
One way to open a Master Lock key box without the code is to use a shim. A shim is a thin piece of metal that can be inserted into the keyhole and used to push the pins up. This will allow you to turn the key and open the box.