Ideal for cutting in ferrous and stainless steel metals, DeWalt type 27 HP metal cutting wheels are crafted with aluminum oxide grain for fast, aggressive cutting and extended life. A proprietary material mix ensures long wheel life. 4-1/2 in. x 0.045 in. x 7/8 in. thin cutting wheelThin 0.045 in. wheel design for fast burr free cuttingProprietary aluminum oxide grain combination for aggressive cutting action2 full sheets of fiberglass for durability and safety