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Impregnated polishing wheel for light stock removal and high luster polishing.Works on various surfaces like steel, aluminium, brass, silver, gold, hard plastic etc. The polishing wheel is impregnated with a silicon carbide abrasive and cooling lubricant, so polishing compound is not needed.SpecificationsShank diameter: 3.2 mm Working diameter: 13.2 mmMaximum RPM: 20.000 1/min