Sait® 22042 Grinding Wheel, Type 27, Outside Diameter: 6 Inch, Thickness: 1/8 Inch, Arbor Hole / Thread Size: 7/8 Inch A.H., Grade: R, Grit: 24 (Coarse), Abrasive Type: Aluminum Oxide, Max Speed: 10200 Rpm, Mounting: Arbor, Product / Materials Abraded: Metal