Ever find that your screwdrivers are either too big or too small?
Do you have a collection of 1/4" hex bits not being used?
This handle is designed to accept short and long hex bits.
The bits are held tight in the handle so they can be collected on an as-needed basis.
Or print them slightly over-sized to allow easy bit changes.
As a bonus, I've included a "persuader" for those places where you need the torque but lack the space to get a good grip on the handle.
It is okay to force the bit into the handle using an appropriate hammer.
These handles are pretty tough regardless of your print settings.
...and for those with a keen engineering eye; this also makes for a decent 3D printed spline drive.
Also note some strange voids within the handle print. These are in place to ensure connecting the OD with the ID. If you modify this part, please keep this in mind.