Magnetic Key Chain
thingiverse
Was looking for an alternative to the $10 magnetic key chains I could find on the interwebs. Took some inspiration from That3DPrintGuy and his take on it. (https://www.thingiverse.com/thing:672357) Was easier to just jump in TinkerCAD and make it from scratch than to modify any existing files. Have two files, one for 6mm x 3mm and one for 8mm x 3mm magnets as that's what I had handy.
Download Model from thingiverse
With this file you will be able to print Magnetic Key Chain with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Magnetic Key Chain.