Needed a nice screwdriver handle for my hex bits for RC cars. So I designed one and think it turned out great.

I don't think this would be strong enough in PLA. ABS or PETG works great.

I have some small magnets and I super glued one to the bottom of the recess.

The large handle fits perfectly in my hand and feels nice and smooth. I did try printing one in fuzzy in cura but didnt like it as much.

Creality

Ender 3 Pro

No

No

0.2

50%

I recommend printing at 0.8mm line width to add some additional strength and also a bit hot temperature.

I also did a gradual infill step at around the 50 or 60mm mark on the large screwdriver so only the top had a 50% infill and the bottom had a 25% infill.

Let me know if the recess is to tight for your bits, it works perfectly for mine but will vary from printer to printer.

Also if you need a different length its a fairly quick couple clicks.