DEWALT 4-1/2 x 1/8 x 7/8" Type 27 Masonry Grinding Wheel features a silicon carbide grain that ensures long wheel life across all masonry materials. Its high grain concentration delivers aggressive grinding action while maintaining smoother running wheels for better performance. Designed with a proprietary wheel structure, this grinding wheel exceptional durability and extended lifespan, making it a reliable choice for your masonry grinding needs. Model Number: DW4528