These premium quality flap discs provide a high stock removal in stainless steel Premium quality Zirconium grain flap discs are engineered for maximum performance stock removal, blending and finishing. The lightweight fiberglass backing absorbs vibration and makes this product incredibly strong and durable. Pro-line Zirconium flap discs are long life & suitable for a full range of metal applications including stainless steel. Abracs Zirconium Flap Discs discs are manufactured to O.S.A. Safety standards. Features: Suitable for a full range of metal applications Suitable for use on stainless steel Outstanding performance High stock removal Long life Specification: Diameter: 115mm (4?") Bore: 22mm Grit: Z80 Max. speed: 13,300RPM