Super-sharp premium ceramic cloth floor sanding rolls cut fast and deliver unparalleled longevity resulting in more footage per roll; they leave a fine scratch for easier sanding and a better overall finish Tough, anti-static X-weight poly-cotton backing is extremely strong and flexible, improves dust collection, and keeps machines cleaner Open coat grain design minimizes loading and provides an aggressive cut to easily sand through multiple layers of tough coatings Extremely effective at medium grit sanding of pre-finished soft and hard wood floors