Two bulk packaged Rotozip RZmas2 2610920547 Silicon Carbide Masonry Wheels, 30 Grit. They can be used for; Brick, Cement, Concrete, Ceramic wall tile, Cinder block, Sandstone, Slate, Patio blocks, Limestone, Fiberglass, Untempered masonite, Non-ferrous metals, Aluminum, Copper tubing, Brass, and Bronze. Maximum RPM 20,000. For use with Zipmate attachment which is not included.