Goldblatt G06183 6-Inch Rub Brick 6" x 3", Rubbing Brick Solid 20 Grit Brick With Soft Grip Ergonomic Handle Used For "scrubbing/smoothing" Concrete Slab Edges After Forms Are Removed Excellent For Industrial use Fluted silicone carbide stone 20 Grit square base Soft, ergonomic Pro-Grip handle Used for dressing down concrete and removing marks