PFERD 31061 Mounted Point, Diameter: 7/8 Inch, Length: 2 Inch, Grade: O, Grit: 30, Abrasive Type: Pink Aluminum Oxide, Bond Type: Vitrified, Max Speed: 24420 Rpm, Bore / Shank Diameter: 1/4 Inch, Shape/Form: A11, Mounting: Arbor, Product / Materials Abraded: Steel