Tungsten Carbide, 3 Piece, 9" x 3/4" Super Tough Sawzall Blade, Used For Cutting Cast Iron & Stainless, Medium & Coarse Grits For Cutting Hardwood Flooring, Cast Iron, Stainless Steel, Fiberglass Materials, Ceramic Tile, Stone, Slate, Clay Pipe, Carbon, Brick, Plaster, Marble & Chalkboard.