* Silicon Carbide is Black in color * The hardest and sharpest manufactured abrasive grain * This is the only coated abrasive that will cut through hard or brittle surfaces such as glass, marble, tile, granite, carbide or hardened finishes * The finer grits are ideally suited for finishing on many surfaces and hardened metals * Available in grits 24 through 600 * These belts come on the RBX cloth backing for durability under all sanding or linishing conditions *

* Zirconia Alumina is recognized by its blue color * A rugged synthetic abrasive that is best suited to stock removal applications * The heavy duty structure requires heavier pressure to break down the self sharpening grains * It is ideal for heavy grinding on ferrous and non-ferrous metals and planing hard woods * Recomended for stainless steel aplication * This abrasive can last up to 5 times longer than aluminum oxide on tough applications * Available in grits 24 through 120 *