Dura-Gold Premium 11-piece 3″ Diameter Abrasive Stripping Brush Wheel Set. 10 pieces of quick change grinding strip discs plus a disc adapter holder with a 1/4″ drill shank.These stripping discs are perfect for removing paint, cleaning weld lines and splatter, removing scale and oxidation, surface prep, and making autobody repairs.The purple diamond material of the strip discs is a high-strength, high-wearing honeycomb soft abrasive tool formed with premium purple nylon webbing and grains.Using fiber mesh as a carrier using resin elastomer, the sharp abrasive adheres firmly to the fiber web.The stripping discs are 0.6 inches thick and operate up to 22000 rpm.