Product Description 5 pack, 4. 5" X . 045" X 7/8", metal cutting wheel, 3 full sheets of fiberglass for durability and safety, use of 100% virgin grain for enhanced removal and long life, proprietary material mix to ensure premium performance, premium resin bonds 100% inspected before use, heavy duty cutting and grinding of ferrous metal such as steel, iron, weld blending and edge grinding aggressive material removal. From the Manufacturer DEWALT High Performance .045-Inch Metal Cutting Wheels have a thin .045-Inch cutting edge design for fast burr free cutting. They have a proprietary aluminum oxide grain combination for aggressive cutting action and the proprietary material mix ensures durable long life wheels. They have 2 full sheets of fiberglass for durability and user safety. These wheels are ideal for high performance cutting in all types of ferrous metals and stainless steel.