Mounted Point, Abrasive Material Aluminum Oxide, Overall Dia. 1 in, Overall Thickness 2 3/4 in, Shank Dia. 1/4 in, Grit 36, Shape A3, Primary Material Application Aluminum, Carbon Steel, Stainless Steel, Operating Speed - Maximum 15,530 RPM, Series 32A, Grade Extra Coarse, Compatible Tool Type Die Grinder, Flexible Shaft Grinder, Straight Grinder, Pencil Grinder, Drills