This is a remix of https://www.thingiverse.com/thing:3210462 design.

I changed the holes on this make to be able to fit the standard Magnet from harbor fright. The magnet will seem like it does not want to fit but if you tap gently with a jewelry hammer of just a normal one it will pop right in with not needing to use glue what so ever.

Link to the magnets - https://www.harborfreight.com/hardware/magnets/10-piece-rare-earth-magnets-67488.html