This is a simple button box that is made to mount to the top of a door trim with 3/4" wood. It is made where it will be just shy of flush with the face of the buttons that I used, which are linked below in a pack of 9.

This is a deep'ish box so I also created a socket to help tighten the 20mm nuts on the back. It is made to fit the nuts snugly to hold them while you get them over the buttons. It's plastic, so don't go all Hulk on the nuts or it will break.

If your first layer is squished a little like mine, you may have to open the holes up just slightly as the fit for the buttons is quite snug.

Below are affiliate links if you choose to help support my work. If you would rather not support me, you can copy the name which I copied directly from Amazon so it should pull up with a simple search. But clicking the link is appreciated