Check out my profile and print VERSION 3 of these mini-screw drivers.  It is a much better model with better tolerances! 

These are mini screw drivers that are perfect for stocking stuffers! Would be good to keep in a car or kitchen junk drawer when in a pinch.

I printed these in PLA.

My machine (Bambu P1P) is really dialed in, and I have the perfect snug fit for the bits. However, if yours is too tight, you can scale it up by 1-2%. If you print these in PETG, you may also need to scale it by 1-2%, because PETG shrinks more than PLA.

I printed these at either layer height of 0.1 or 0.15. I have not tested 0.2. With the small threads, the smaller layer height is better!

The threads are tight at first but will loosen up and work perfectly after you use them a dozen times. I usually just open and close the cap 20x right after printing and then they work well.