1/4in (6mm) to 1/8in(3.175mm) Hex Shaft/Collet Adapter
My first upload to Thingiverse!
To retain dimensional accuracy, I suggest painting the seam in the slots on the flats. If you find the print undersized I suggest printing with a brim and use the leftover lines or sizing up the part by 0.5-1% to get a better fit. The inside part of the adapter is undersized by 2 thousandths to ensure a better fit. This wont make much a difference while printing but it still may be helpful.
The reason why this was created was because I had bought an amazon basics screwdriver for screwing in small screws and did not realize the collet of the screwdriver was actually 1/4in, which did not match my set of small bits. So I designed this, a quick print to solve this small issue, as such I wanted it to share it with people because while this specific issue is rare its quicker and easier to 3D print this rather than order, especially for situations that don't require very much torque.