Driver handle, designed to accept standard type universal ¼ inch driver bits with locking groove, whether that be screw driver bits or even hex bits etc. 

Has an internal clip to grip the bits so they don't fall out.

Designed to be printed at 45 degs with modelled in support to give more ideal layers for strength. Support easily snips off.

Best printed with 5 walls, 55% tri-hexagon infill.

I recommend PLA Plus for this print although you can use your favourite filament.