I inherited a set of nut drivers without a case. I wanted to wall mount them and have them stay put in the wall mount. The bottom piece holds small rare earth magnets (6mm or 8mm in diameter x 3mm thick). These hold the nut drivers securely in place while still allowing them to be easily removed. The magnets are a tight fit and need to be pressed in place. I also put a drop of super glue on the edge of each magnet to make sure that they don't accidentally come out.

Assembling this is a tight fit. I had to put the pieces together on the floor, stand on the top piece and jump a tiny bit. After that I then used a rubber mallet to get them to sit fully flush. I put in three screw holes which probably aren't necessary, but hey, over engineering is the American way!

Due to the exact measurements required to get the magnets to make contact with the metal of the nut drivers, I'm not sure if this exact design will be of any use to others. I am putting it up here so someone else might benefit from and improve upon my idea.

I printed this in Polymaker polylight PLA. All the other settings I used should be in the attached .gcode files.