Abracs Premium quality Zirconium grain flap discs are engineered for maximum performance stock removal, blending and finishing. The lightweight fibreglass backing absorbs vibration and makes this product incredibly strong and durable. Pro line Zirconium flap discs are long life and suitable for a full range of metal applications - stainless steel, sheet metal, mild steel and high grade steel. Manufactured to O.S.A safety standards.