Concave Abrasive Bullnose Angle Grinder Grinding Wheel (25mm Grinding Edge) Tool Brazed for Stone, Marble, Granite, Ceramic & Artificial Stone (74mm Wide - 20mm Hole)\nUse personal protective equipment when operating, including adequate mask, goggles and gloves. DO NOT use with quartz due to the dangers of that material.\nBullnose grinding wheels are made with a brazing process that makes them more durable and effective than other types of grinding wheels.\nThese wheels can be used on a variety of materials, including stone, marble, granite, ceramic, and artificial stone.They're especially useful for shaping concrete walls in buildings, and for creating edges and bevels on decorative marble and granite panels.The grinding material on these wheels is tough and long-lasting.