Summary

I really like the shape and grip from the Vessel ball grip 1/4 hex drive, I wanted to adapt that same shape to a spinner handle, I modeled these up to fit the 1/4 and 3/8 drive extensions you get from Harbor freight (see picture in gallery showing socket set) I'll be adding a file for the 1/2 drive, but ran out of time today.

I'll upload the step files as well if you wish to modify for your existing socket extension! enjoy ^.^