Upside Down Key Hook and Tray

This project uses 12x3mm magnets. The cavities are sized on the attached file for a tight press fit of the magnets so no glue is required. I bought the magnets at home depot, but as long as you match the size you can get them anywhere. I added a magnet to the parts list that has the same measurements on the Maker's supply website, but I have not bought and tested these. You can easily scale the model up or down though if the cavity is not the perfect size. The pieces are separate and can be adjusted for different length key chains, but will work best with light chains. *Disclaimer: not all keys are magnetic, you must use a key that contains ferromagnetic materials (examples iron, cobalt, nickel).