Excel Abrasives manufactures Single Point Diamond Dressers. Excel Abrasives supplies industrial diamond products. Single Point Diamond Dressers are used for general and precision engineering. Single Point Diamond Dressers removes dulled abrasiveness from the grinding wheel and allows the wheels to cut properly. These are available in three grades. Gem grade natural with four or more re-settable points, Congo premium quality with elongated point, and commercial grade with bruited point. It is available in the sizes from 0.10Carat to 4 Carat.