Mosdan Woolfelt Concrete Floor Polishing Pads are designed for grinding and polishing concrete. It can vary from surface to surface depending on roughness, porosity and density of the medium being applied. Application technique can also vary the coverage. On flat, dense surfaces, the coverage should generally range from 5000 to 8000 square feet per pad. It can be made in 7'', 9'' and 11''. Wet or dry use are available.