I bought this Ryobi Magnetic Steel Nut Driver Set (6-Piece) from Home Depot many years ago. It came with a cheap bit holder.
More recently WERA released their Tool Check Plus tool holder for bits and sockets. I thought it was a great idea that would be easy to customize. So I searched Printables for a ready to build model. I found it here: https://www.printables.com/model/1123683-wera-tool-check-klein-6-in-1-10-more-bits
Rygar1432 did a great job matching the Tool Check Design except for the hex bit slots. He went with a more traditional design.
I changed his design to mimic the Wera design. I like it and you don't need magnets if everything is printed well.
Then I changed everything a little to fit the tools I wanted to hold, basically a combination of 1" and 2" long bits. I added Wera, Dewalt, Makita, and of course Ryobi nut driver bits. I chose the best and/or unique sizes. For example, the Torx bits are all Makita, and the metric Hex bits are Wera. It is super compact and I love it.
I plan to play around with the design some more and see what else I can create.
The author remixed this model.
Changed size, spacing, hex slots, removed unused parts, etc. Basically a total rework but it looks similar.