Goldblatt G06168 8-Inch Rub Brick 8" x 3", Rubbing Brick 20 Grit Brick Used For Smoothing Corners & Edges After Removal Of Forms 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 Large 8-Inch by 3-Inch base