There's plenty of short hex bit holders on here but no long ones for 100mm screwdriver bits, so I made this.

It also served as an experiment into getting Fusion 360 threads to 3D print, as by default they won't work at all.

In the end I added 0.5mm of clearance to each face of the thread as well as a 0.3mm fillet to the pointy edge. Possibly you could reduce this to 0.4mm but 0.2mm or below definitely doesn't work.

It holds 17 bits and they are loose, I don't like the designs that are so tight you hurt your fingers pulling the bits out, but the lid keeps them from moving about much. If you don't like that you could add magnets or make the holes smaller than 3.8mm radius in Fusion360 (it's a user parameter).

I've got some 75mm bits that also fit in this but the lid could be made smaller for them (saves print time too).

FlashForge

Creator Pro

No

No

0.20mm

20%

You could reduce the print time by trimming the top and bottom of the base a bit.

The lid has a brief moment of overhang as it begins to print the thread in mid-air, but it soon sorts itself out and prints the rest just fine. You could fix this by adding a fillet to the top of the screw thread - that's not important as nothing screws into that side (essentially it's the end of the screw).

Fusion360 source is provided. I had to convert the 3mf to stl for thingiverse.