This is a wrench to tighten the large plastic nut on an arcade button.

It works well with the GoldLeaf Pushbuttons from Ultimarc. (I do not know if it will work with other similar buttons from other vendors.)

The OpenSCAD file is included in case you want to make changes.

If you want to test the fit you can change the OpenSCAD file to make it shorter for a test print, or you can just adjust the Z height of the object in your slicer.