Borazon has the highest hardness after diamond and abrasive ability, has high heat resistance and high brittleness; inert to iron.It is used for the manufacture of tool grinding powders and micro-grinding powders in all bundles for finishing of precision parts from hard-hardened steel, as sandpaper for finishing work, a tool for finish grinding at the sharpening of the cutting tool. Finishing work are made also with freely moving grains