Is an emergency key, use with caution. The dimensions are set, you only need to make the pattern of your key.

-------------------------------------------- Update ----------------------------------------------------------

Some cuts were very thick, but they are already fixed. I uploaded a .dwg file for manipulation in autoCAD, to make the pattern, you can import a image of the key and then scale it.

If you make one, plis show some pictures, there is a gif for you to see the functionality of the printed key.