10" X-weight PSA Cloth Back Sanding Disc 80 Grit - 7 Pack* Resin over resin bond construction is resistant to heat & moisture.* Hot melt adhesive back PSA coating allows for quick change & less down time.* Strong "X" weight cloth backing provides excellent strength.* Use on ferrous & non-ferrous metals,as well as wood,plastics, & Fiberglass composites.