OCR 4" Concrete Turbo Diamond Grinding Cup Wheel Three Row Turbo Cup Disc Grinder for Angle Grinder 12 Segs Heavy Duty (Yellow 12segs B) This aggressive turbo cup grinding wheel provides for very fast cutting action on masonry, stone and concrete Large grinding segments with heat treated cup design Suitable for use on grinding on marble, tile, concrete and rock Three row design for grinding granite ,marble ,rock and concreteUse Dry/Wet to smooth Concrete or Field Stone Heavy Duty Contractor PRO Grade 4 Inch Grinding Wheel