Cup Wheels are used for grinding concrete, removal of epoxy, paint, and coatings. Double-Row Cups cover twice the surface of a single row and are excellent and economical for grinding concrete, stone, and all masonry. Swirl Cup Wheels feature turbo style segments for faster, more aggressive removal of hard materials. Arrow Cup Wheels are designed for removal of epoxy, paint, and other coatings. The arrow segments are slightly slanted at an angle away from the center of the cup, which prevents “gumming up” as with competitors wheels. Use wet or dry.