This is an adapter made for the IKEA SKÅDIS system and HORI WALL acoustic panels.
You can use the original screws that come with the SKÅDIS board.
I made this because I didn't want to drill into my new acoustic panels. This solution can be pressed into the panel without harming it.
This way, you can later change or move your SKÅDIS board around without leaving any holes.
There are no supports needed !
Here is a quick sketch of my panel dimensions: