Shapton 4000 grit (3.68 micron) GlassStone shinwa measuring tools The HSS is ideal if

The HSS is ideal if you plan to reverse the blade to bevel up and use it as a scraper since it will hold up better under heat

They also work very well in drill presses because they have a brad type point instead of a lead screw

The steel shaft runs through the handle which also facilitates the transfer of force to the screwdriver tip

The cloth can be stored in a ziploc bag when not being used

5 mm thick

Shapton 4000 grit (3.68 micron) GlassStone shinwa measuring tools The HSS is ideal ifThis 4000 grit (3. 68 micron) GlassStone (50103) is a medium grit, so cuts quickly but leaves a fairly fine finish. The Shapton GlassStone HR series of ceramic sharpening stones are the most advanced series of stones that Shapton makes they are designed to cut both modern tool steels and high carbon steel very quickly, but wear very slowly, so don't need to be flattened as often as most waterstones. The stones have a 5 mm thick layer of very