The Mercer 601020 is a 7 Masonry Cut-Off Wheel. The masonry cut-off wheel is used on Portable/Hand held circular saw for fast and effective cut. The Mercer 601020 is used to cut masonry products, concrete, reinforced concrete, brick, block, roof tile, stone & artificial stone. The cut-off wheel has a silicon carbide grain and is made up of high strength phenolic resin bond. The Mercer blade is also double external reinforced with high tensile strength fiberglass.