PFERD 63410 Grinding Wheel, Type 27 Depressed Center, Reinforced, Pipeline, Universal Line PS-FORTE, Outside Diameter: 4-1/2 Inch, Thickness: 1/8 Inch, Arbor Hole / Thread Size: 7/8 Inch A.H., Grade: M (Soft), Grit: 46, Abrasive Type: Aluminum Oxide, Max Speed: 13300 Rpm, Mounting: Arbor, Product / Materials Abraded: Stainless Steel (INOX)