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.