This is a latch design for the AI Pin. V1 was just a square with slots for the magnets, this version was resized and rounded to match the layout of the pin itself.

You will need 4 of 8x3mm magnets, this is the link to the magnets i bought from home depot.

https://www.homedepot.com/p/Master-Magnet-0-3-in-x-0-11-in-Neodymium-Rare-Earth-Magnet-Discs-10-per-Pack-07045HD/202526363