I like using Pocket Screwdrivers, but they are like getting impossibel to buy - so - I decided to print my own - now you can too [Nerds of the world unite :-) ]

I found PLA Carbon Fibre made the best handles, but PLA ABS or PETG will all work. I used a small nozzle (0.25mm) for maximum detail, but again 0.3mm or 0.4mm will both work, they just won't look as professional.

For the actual metal screwdriver part, I got 6 + & - screwdrivers on eBay for under $2 each - they were sold as Insulated Handle Hand Screwdriver Screw Driver Electrician Repair Tool, the metal part is approximately 3mm dia and 75mm long. I cut them off with a diamond cutting wheel, and put flats on both sides, as shown in the pictures. Then press the metal into the handle, heating it if it's too tight (or epoxy in place if too loose).

The handle is quite fragile, so it has a 1mm hole all the way through, just insert some 1mm carbon fibre or Piano Wire inside - I recommend after applying some epoxy for a permanent result.

There are two versions, with a + or - on top to match the tip