Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:3571224.
I know that there are probably dozens of other interchangeable screwdriver handles out there, but I like to reinvent wheels. Besides that, I don't think I've ever seen one that incorporated a retaining ball like the type used in ratchets and socket drivers.
This is only my second model in FreeCAD and I still have no idea what I am doing, so with that in mind, I think this turned out pretty good, if I do say so myself.
I initially printed this without any ridges, mainly because I forgot that I had wanted to, so there is a v2 of the handle that does have ridges.
You can use this either with or without the ball, but... why not?
NOTE Due to either a Thingiverse bug or (more likely) shadowbanning, my models no longer show up under the [Newest] listings. If you want to see more of my models, please be sure to 'follow' me. If you print this, it would really help if you'd post a 'make' so that others could find this model.