• Exceptionally high-performing seeded gel ceramic alumina and friable aluminum oxide abrasive blend for fast stock removal, cool, superior cutting; 3X-5X more life than aluminum oxide wheels; 2X stock removal rate vs. conventional abrasives • High performance bond for versatility (for grinding high sped tool steels, hardened and soft steels, and aerospace alloys) and exceptional form holding • Self-sharpening abrasive minimizes burn and dressing, to maximize sharp edge on tools and dies for longer life in production • Best choice for high productivity, low total per-part grinding cost • Made in USA in ISO certified facility • 5SG Durable Norton SG and aluminum oxide blend blue for high stock removal rates, excellent productivity, long wheel life, low overall grinding cost • NORPOR 3SGR Purple Norton SG and 48A abrasive blend with VP2 porous bond for maximum productivity in heat-sensitive, heavy stock removal operations • Used on surface, cylindrical, and tool and cutter grinders, Norton precision, form-holding vitrified toolroom wheels maximize your productivity. Available in latest-generation ceramic alumina, aluminum oxide, and silicon carbide for every ferrous and nonferrous MRO, small job shop, and production operation.