I show how to use a Watchmakers Screwdriver sharpening tool, specifically the Horotec MSA01.500
I use a combination India Stone that has 2 sides, a medium and fine grained, although I typically only use the fine grained side to sharpen screwdrivers. You can also use an Arkansas Stone for a similar result.
Need to buy one? Find one here:
https://watchoffthecuff.com/products/tool-for-sharpening-screwdriver-blades
https://watchoffthecuff.com/products/india-stone-rectangular-with-2-grains-coarse-and-fine
https://watchoffthecuff.com/products/arkansas-stone-with-wooden-base