Introducing 8 in. 150-grit Aluminum Oxide Grinding Wheel by POWERTEC We've paired the aluminum oxide abrasive with a fine 150 -grit, allowing this grinding wheel to produce heavy cuts and offer rapid stock removal. This impressive combination offers a high purity profile, making this item perfectly suited to work with carbon steel and tool steel (Not including tungsten carbide, cemented carbide and ceramic tool). Introducing the 8 in. 60-grit White Aluminum Oxide Grinding Wheel by POWERTEC This 8 in. bench grinder wheel was designed to fit most stationary bench grinding machines for high speed steel sharpening and deburring. It features premium white aluminum oxide with a vitrified bond. As this abrasive grinds down with wear, it produces a consistent and fresh grinding surface for balanced work. Whether sharpening your metal lathe turning tools, lawnmower blades or other HSS tools-this grinding wheel stone will get the job done with high precision results. Commonly Used Applications Lawn mower blade sharpening tool Metal lathe tool sharpening Sharpening HSS drill bits Planer blade sharpener Chisel sharpening tool.