The United Abrasives/SAIT C24N Concrete wheel is excellent for grinding masonry, concrete, stone and aggregate. The C24N wheel can be used on hard to grind metal like cast iron and carbide. This wheel features a soft bond for fast stock removal. Proudly manufactured in the USA.RECOMMENDED USE: For use on concrete (masonry, concrete, stone) and metal (cast iron and other ferrous metals, carbide)FEATURES: Special silicon carbide grain formula is excellent for grinding masonry, concrete, stone and aggregate. The C24N wheel can be used on hard to grind metal like cast iron and carbide. Proudly Made in the USACOMPATIBILITY: Angle grinder; 8,500 max RPMSPECIFICATIONS: 7" diameter, 1/4" thickness, 7/8" arborMATERIALS: Special silicon carbide grain; reinforced with the highest quality fiberglass for maximum safety and performance