This is a stubby ¼" bit driver for small projects. I designed it after I apparently misplaced my Wiha stubby driver while working on a project. Knowing that the Wiha will eventually turn up, I decided to forego the purchase of another one, and model up a driver to use in the meantime.

While I was at it, I figured I would add some features to it to better suite the way I use bit drivers and it turned out better than I was expecting.  It weighs in at 26 grams (a little under 1 oz) with the magnetic and 608 Bearing installed.  

Features:

• Magnetic Bit holder
• Rotating handle (for single hand use)
• Bit storage - the handle has enough room for a single bit.
• Rated for up to 25+ inch-pounds of torque (which should be more than enough for everyday tasks)
• Optional magnetic ¼ socket end cap

Parts Needed:

• 6x2mm Magnets 
• 608 Bearing

Assembly:

• Lay the 608 Bearing on your work surface and firmly press the handle into it.
• Press in the rotating knob into the 608 bearing
• Stick the 6x2mm magnet on a long bit, and put a small dap of super glue on the bottom of it, then slide it into the bit holder and press it into place. Let the glue set for a couple hours before using it.

Testing:

I used a Wheeler Fat Wrench to test the torque limits on the 608 Stubby.  I was able to average 35 inch-pounds of torque before the bit would slip (printed in PETG); but once it slips, that's it.  The driver held up fine when repeatedly torquing it to 25 inch-pounds.  Printing in Elegoo tough PLA 40 inch-pounds before failing!  

I recommend you print this is PETG for heat resistance (so it won't melt in the car!) As far as real world testing, I have used it to replace a couple light switches and receptacles, laptop disassembly for a memory upgrade, as well as working on a couple of my folding knives.