Abrasive stone

Crystolon (silicon carbide) combination benchstones have both coarse and fine grit silicon carbide surfaces.These fast-cutting stones sharpen edges on your tools to moderate tolerances quickly. Dark gray in color. India (aluminum oxide) combination benchstones have both coarse and fine grit aluminum oxide abrasive surfaces and will produce strong, keen, long-lasting edges on quality tools. Orange/brown in color. These are Carborundum GOOD tier products. Features & Benefits Crystolon Sharp, silicon carbide abrasive Enhanced cutting action Fast stock removal Vitrified vond for long life and excellent form holding India Aluminum oxide abrasive Fast, cool cutting action Maintains high part tolerance Vitrified vond for long life and excellent form holding