DEWALT Diamond Cup Wheel DW4777 5 Inch Angle Grinder Disc (Double Row Segments 5 8 11 Threaded Arbor Concrete Masonry Floor Leveling Grinding) Rotary Hammers Outfitted with five progressive rounding Outfitted with five progressive rounding over bits ranging from 1 8 inch to 1 2 inch radii and an interchangeable 3 8 inch ball bearing that converts every profile into a stepped beading cutter Featuring a specialized 72 tooth low profile teardrop ratchet with a head 20% thinner than standard profiles The DEWALT DW4777 5 inch double row diamond cup wheel delivers aggressive concrete thinning DEWALT DW4777 5" Double Row Diamond Cup Grinding Wheel