Sunburst® Radial Bristle Discs by Dedeco® are impregnated with a specially treated ceramic abrasive grain resulting in longer life and faster results requiring no polishing compound. Safer and more flexible than wire brushes. Radial Discs are long-lasting and cool running with operating speeds of 3,000 - 18,000 RPM. Lower speeds allow a softer touch, greater flexibility and more subtle results. Higher speeds provide more aggressive material removal. Use a single disc for tight areas like slots and grooves or stack them for larger surface areas.