DEWALT DW3521 7-Inch X 1/8-Inch Masonry Abrasive Blade Premium silicon carbide grain for long life and fast cutting Proprietary material mix ensures durable long life wheels 2 full sheets of fiberglass for durability and safety Specially designed to cut through masonry materials 7-inch MAS Abrasive Blade Premium silicon carbide grain for long life and fast cutting Proprietary material mix ensures durable long life wheels 2 full sheets of fiberglass for durability and safety