Drill Bit Holder

This is a basic design to hold drill bits. It holds a range of 10 drill bits of each size from 3mm down to 1mm with 0.5mm increment.

I uploaded the .step and .f3d so you can customise it.

The hole profile details are hard to render with a 0.4mm nozzle but they are not strictly necessary. On your slicer settings, do not forget to print the outer walls before the inner walls for better dimensional accuracy. Slow printing speed (I used 50mm/s) also helps with the holes accuracy.