The United Abrasives/SAIT Ovation® Attacker® Flap Disc is contaminant free. Made with high performance zirconium grain, the Ovation® Attacker® Flap Disc is designed for a wide variety of grinding and finishing applications. Our Fiberglass backing will wear uniformly with abrasive cloth, will not splinter or smear on the workpiece. Lighter, quieter operation. Proudly manufactured in the USA.