Diameter: 1-1/4 in. Thickness: 3/4 in. Grit Material: Aluminum Oxide Shape: Cone Grit: 60 Grit Product Type: Stem Mounted Point Application: For Grinding, Polishing or Deburring Ferrous Metals or Other Hard Surfaces Shank Diameter: 1/4 in. Maximum RPM: 38050 Grit Type: 60 Useful where larger wheels won't fit or where smaller abrasive wheels wear out too quickly Use in electric drill or other similar machines