This wheel dresser from Norton has approximately 20 industrial diamonds randomly imbedded in a 3/4" x 1/4" head. It will deglaze, shape and true any grinding wheel including silicon carbide, aluminum oxide, ceramic and others. Just make sure the wheel dresser is supported by your grinder's tool rest before addressing the spinning wheel, then with a light touch move the tool back and forth across the stone. 10" long with a plastic screwdriver-type handle. Well-made and should last a lifetime.