DeWalt Metal Cut-Off Wheel *Product Type: Metal Cut-Off Wheel *Wheel Diameter: 4-1/2 in. *Arbor Size: 7/8 in. *Application: Metal and Stainless Cutting *Thickness: .045 in. *Grit: 60 Grit *Maximum Speed: 13300 rpm *Arbor Type: Type 1 *Material: Aluminum Oxide *High Performance* Thin .045" wheel design for fast burr free cutting * Proprietary aluminum oxide grain combination for aggressive cutting action*Proprietary Material Mix ensures durable long life * 2 full sheets of fiberglass for durability and safety *Discovery ACC