I made a 1/4" FEMALE HEX to 1/4" FEMALE HEX adapter that fits on the big slotted blade (over the tip) of my DURON Retract-A-Bit screwdriver, thanks to its shaft being a 1/4" hex. I can now use my multi-blade DURON as a bit holder.
The adapter is a hack made of two others expoxied together...