Check the listing for details. GRAINGER APPROVED 05539554420 Hook-and-Loop Surface Cond Disc,5 in Dia 435Z32. Condition: New. Listed at 4.57 USD. Hook-and-Loop Surface Conditioning Disc, Abrasive Type Non-Woven, Abrasive Material Aluminum Oxide, Backing Material Nylon Mesh, Backing Weight Not Applicable, Coating Coverage Not Applicable, Grade Fine, Grit P220, Overall Diameter 5 in, Series Surface Prep, Number of Vacuum Holes Non-Vacuum, Color Blue These discs use a hook-and-loop attachment method to adhere to the disc pad. The abrasives are incorporated into non-woven nylon fibers. They can be used to remove material such as paint or wood finish to make surfaces smoother for finishing, or rougher for gluing. Aluminum oxide discs are suitable for a variety of applications, such as removing surface defects, light burrs, parting lines, flashing, rust, oxides, corrosion, paint, or scale. It is also suitable for cleaning molds and blendi.