The POWERTEC 15521 is a grinding wheel disc specifically designed to work with most 8-inch bench grinder machines. This cost-effective tool provides clean, potent edges and surfaces, and is ideal for tool grinding, smoothing blades and metal working. High Performance, High Strength & High Precision Grinding These wheels are virtually chemical resistant and not affected by water, oils, or acids. In addition, they possess a low impact resistance and high wear rate. This abrasive wheel is fast, impressively sharp, and burr-free making it perfect for: Grinding Sharpening Stock Removal Blending Rust Removal Finishing We’ve paired the aluminum oxide abrasive with a fine 80grit, 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 & ceramic tool). Size Specifications and Material Details Abrasive Wheel Diameter: 8 Inches Thickness: 1 Inches Arbor Hole Size: 5/8 Inch Abrasive Grit: 80 Abrasive Grade: fine Maximum RPM: 3600 POWERTEC is a US based manufacturer of high quality woodworking machines, wood work accessories, and a wide assortment of OEM replacement parts. We are committed to exceeding expectations, while bringing the best innovations, technologies, and product development to the industry.