United Abrasives- SAIT 23455 Type 1 14-Inch x 1/8-Inch x 20mm Type 1 A24R - General Purpose Portable Saw Cut-Off Wheel, 10-Pack A24R - General Purpose. Aluminum oxide grain. Provides consistent performance with long life. Ferrous metals (steel, angle iron, rebar) Type 1 shape for square, burr-free cutting Externally reinforced with the highest quality fiberglass to withstand the toughest applications. Available in many arbor sizes to fit a wide variety of tools.