Natural stone (original-Arkansas) of very fine grit quartzite; very strong edges. For the finest surfaces and burr-free grinding. 8000 grit (polishing).
For deburring, sharpening, truing and chamfering of tools and tool cutters. For re-working bores, surfaces and edges in mould making. Also for improving the surface for stock removal, finishing, and polishing. Best used with oil, paraffin or water.
Low dose of oil increases tool life and edge sharpness.