United Abrasives-SAIT 23101 Type 1 4-1/2-Inch x .045-Inch x 7/8-Inch A60S General Purpose Thin High Speed Cut-Off Wheels, 50-Pack A60S - General Purpose. So unique it has a patent. Thin .045 width. Special aluminum oxide grain. Hard bond for extremely long life. Fast, burr-free cutting. Ferrous and/or non-ferrous metals (iron, steel, welds, etc.) Special Aluminum Oxide formulation offers the fastest cutting, longest lasting thin wheels. Externally reinforced with fiberglass layers to provide ultimate safety in a thin wheel