United Abrasives-SAIT 23042 Type 1 A36T Fast Cut-Off Wheels, 3-Inch x 1/16-Inch x 1/4-inch, 50-Pack Aluminum oxide grain, hard bond for aggressive cutting on rough applications, ferrous metals iron, steel, welds, stainless steel Type 1 shape for square, burr-free cutting Externally reinforced with fiberglass layers to provide ultimate safety in a thin wheel Wide range of grit sizes available for aggressive action to burr-free cutting