Our keys were all over the place, so I decided to create a neat little key rack to gather them. I added slots for magnets so it's easy to snap them underneath a little shelf I can also place our incoming mail on. In my case, it's printed in glow in the dark filament so I can even find my keys in the dark (yes, I am aware that will never ever happen).

It doesn't need any supports or even a raft/brim.

When you decide to print this, you're also probably in the market for magnets, I used magnets with a diameter of 8mm and they're 3mm thick. I ordered them for very little money on AliExpress: https://nl.aliexpress.com/item/1005004058464030.html

Snapping them in is pretty rough, because you don't want these falling out at random times. I snapped them underneath a flat, iron object and then pushed down in the holes.

Good luck!