151925 Features: -Grinding Heads MK-1010 S.-Available in either 10 and 20 segment configurations.-"S" heads for hard material (old or cured concrete).-Item # 151925.-Diameter: 10".-Grade: Premium.-Mount: 4 Bolt.-Segments: 10. Color/Finish: -Designed to give rough concrete surfaces the smoothest finish in the quickest time. Dimensions: -Weight: 8.4 lbs.