Shapton 4000 grit (3.68 micron) GlassStone Narex 813519 A half-turn will rotate the

A half-turn will rotate the magnets which pushes forward a pin connected to the cartridge

so don't need to be flattened as often as most waterstones

1-1/2" (39mm)

and can be used in conjunction with HNT Gordon tail vises

Shapton 4000 grit (3.68 micron) GlassStone Narex 813519 A half-turn will rotate theThis 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