Simple Magnetic Key for Hall Sensors

Just a simple and useful design for a magnetic hall sensor key. If you use a linear one which detects both polarity of your magnet, you can simply see which is which (marked as 1&2). If you like to print in different colours (like me, Black and White), you can chose the single Key Top and Key Bottom. If the colour does not matter, you can print the whole model at once.

Neodym 5mm diameter, 3mm height.

If you're overextruding, you have to drill the lock-holes with a 3mm diameter drill.

Push the top plate in the bottom plate if your magnet has the right orientation. I the magnet can't be removed if pushed in, but I absolutely dont like moving magnets inside a 3d printed housing.