I have brownells thin bit set and they need to be annealed .i learned to file up my screw drivers from Len bull and Jack Rowe you can use a grind wheel in a drill press at slow speed to shape the tip of your tool.
I use a 1” diamond wheel in my drill press to reshape screwdrivers. Perfect radius for holllow grinding and for some reason doesn’t heat up the metal as a stone will. And I use a small machinist vice purchased on eBay to clamp the screwdriver in. Grind one side and flip the vice over and grind the other side. The result is a driver with perfectly parallel sides.
