This is a simple tool that you can use to open up kailh switches. In its current state it requires two ~20mm m3 screws to assemble.
Edit: a new file called
...さらに表示 thicker wedge has been added. This piece works a lot better and causes the top housing to pop off rather than just loosening it.
Edit: I would not recommend printing the wedge in its current orientation. Instead, try rotating it 90 degrees so that the large flat side is on your print bed.