The United Abrasives/SAIT Ovation® Attacker® Plus Flap Disc is contaminant free. The Ovation® Attacker® Plus Flap Disc is made with high performance zirconium grain and designed for a wide variety of grinding and finishing applications. Our plastic backing reduces operator fatigue. Proudly manufactured in the USA.RECOMMENDED USE: For use on stainless steel, high tensile steel, titanium, ferrous metals, non-ferrous metals, aluminum, copper, brass, etc.FEATURES: High density, Type 27 flat shape disc. High performance zirconium grain for a wide variety of grinding and finishing applications. Provides long life while maintaining high stock removal rates. High density discs have 40% more material than conventional regular density flap discs. Plastic backing's ease of use reduces operator fatigue for a longer life than fiberglass backing at the same cost. Contaminant free. Proudly Made in the USA.COMPATIBILITY: Angle Grinder; 13300 max RPMSPECIFICATIONS: 4-1/2" diameter, 7/8" arbor, 40 grit, Type 27MATERIALS: High performance zirconium grain; plastic backing