Engineered with a premium, selfsharpening zirconia alumina abrasive, ProSand R811R816R831 coarse grit cloth portable belts deliver excellent cutting on any surface Featuring antistatic and proprietary, patented grain technologies, these belts ensure a cleaner work environment and produce a superfine scratch pattern and finish When compared sidebyside to the next leading competing product, these durable belts cut faster and last significantly longer A great choice for coarse grit stock removal, these portable belts are conveniently packaged for protection during transport and easy storage