I created this item because I got tired of all these unusable 4mm bit holders from china (plastic piece with a row of holes) in my drawers. I never used all the 4mm bits and the screwdrivers because they were to inconvenient and I kept looking for the right bits all the time. Also, combining sets of bits was hard.
This holder can keep up to 96 bits (5 rows of 16 and 2 banks of 8 on the top) as well as 3 screwdrivers with a diameter of up to 16.5mm (should work with the WowStick and most chinese pen-style screwdrivers). These holes also perfectly fit Edding 3000 type permanent markers (totally by accident). 96 places for bits are plenty to sort my collection of 4mm bits and have some space to spare for organising and sorting them by keeping the different kinds separated. It can accommodate long as well as short bits and has enough room in between for the thicker nut-style hex driver bits (see the pictures)
The bit holes are about 7mm deep, the screwdriver holes are >20mm deep which should lead to a solid hold and tools should not fall out.
On the back are 2 slots for hanging this on screws. The slots have 120mm separation so you should be able to attach this to a 40mm (IKEA style) pegboard if you make your own holders. I have no such pegboard so I did not construct any yet... Maybe it fits other pegboards, maybe not.
Because this part is kind of big and therefore a pricey print, I included a smaller variant (same side profile, same hole sizes) that you can use to test-print and check before you commit to printing the large one. (There is a picture of the several designed minified variants I printed before I got the hole sizes right - the one on the right is the part you get)
This is kind of a "works for me" thing. much could be improved, but I was very lazy and because it works for me, I did not optimise further.
If you look at the picture with the several mini variants, you can see I started out with a concave arrangement but noticed that the bits are quite hard to pick up from that and that the longer bits are so close together at the tip that you can not visually distinguish between them properly. I changed to a convex arrangement, which is much more usable even if more expensive to print and less visually pleasing (to my eye at least).
Why you should print this: It has 96 bits! Come on... your processor probably only has 64bits so this is 32 bits better!....
Heatbed recommended because of the large contact area on the bottom.