Steel Cover Flap Wheel Lid thousand rounds Uses: Suitable for grinding all kinds of irregular surfaces and ordinary plane, descaling and polishing. Widely used in automobile manufacturing, heavy machinery, shipbuilding, aluminum, stainless steel, metal and decoration industries, the metal industry or bore polishing abrasive has a good effect features: abrasive cutting sharp, safety and environmental specifications: diameter (2 '' - 20 '') X thickness (3/4 '' - 7 '') X aperture 25.4 - 170mm particle number: A40 - A800 (Z36 - Z120 \ C40 - C600)