The material is among the hardest and best sharpening materials and is well suited for tools with predominantly flat edges such as axes, hand axes, chisels and cleavers, One side with coarse grit (120) for quick sharpening, One side with fine grit (320), One side with fine grit (320) for fine grinding or burnishing, Application: With light oil for fine sharpening, With kerosene for normal sharpening, With water for coarse sharpening, Dry for a particularly intense sharpening
