Allows to attach a magnet to M5Atom Echo using the built-in M2 screw hole. Magnet I used had a size of around 19x2.3 mm and a hole in the middle. It should be inserted mid-print. 
 

Why did I design this instead of just screwing in the magnet directly?
The holes in all the magnets I had were too large to attach them using M2 screws. It was possible to attach it with a washer but that prevented the device to be attached evenly.