Stubby4, a mini screwdriver handle.

A mini screwdriver handle. Insert a 1/4 inch driver and screw away the rest of your day. ;)

You may have to scale the size depending on your printer and settings to get the bits to fit properly.

Stubby4 (1) is a small tweak to the rim at the base of the handle. I'm leaving both files up so you can choose the one you like the most.