Packed with a high grain concentration for aggressive cuts and smooth-running wheels, Dewalt Type 1 masonry cutting wheels can tackle tough masonry with ease. A thin .045 inch wheel design delivers quick, burr-free cutting, and 2 full sheets of fiberglass offer durability and safety. Softer formulation for faster cutting2 full sheets of fiberglass for durability and safetyProprietary material mix ensures durable long life wheels