HEX1GHP20 Hexpin® Surface Grinding Plate 10 x 3/4 arbor, 4 holes, 20 SegmentsDesigned for grinding concrete. They are excellent for aggressive stock removal and give rough concrete surfaces the smoothest finish in the quickest time. Can be used on single head floor machines and may also be attached to Pearl's 11" Hexplate for use on the GRM11. Wet or dry use. Fast grinding. Long life. Prop 65 Warning: This product can expose you to chemicals, including nickel, which are known to the State of California to cause cancer. For