I have designed a holder for drill bits for my tool wall. You can fix the holder with a Ø3.5mm screw.

Suitable for Ø2, 2.5, 3, 3.2, 3.5, 4, 4.5, 5, 5.5, 6, 6.5, 7, 8

I have also made a holder for a step drill and Forsner drill bit

Step drill: Step drill holder by Magr099 - MakerWorld

Forstner drill: Forstner drill holder by Magr099 - MakerWorld