Vitrified Mounted Point, Abrasive Material Aluminum Oxide, Bond Type Vitrified, Overall Dia. 1 in, Overall Thickness 1 in, Shank Dia. 1/4 in, Grit 60, Shape A21, Primary Material Application Carbon Steel, Shank Length 1 1/2 in, Specification 38A M, Operating Speed – Maximum 35,510 RPM, Series Gemini 38A, Grade Medium, Compatible Tool Type Die Grinder, Flexible Shaft Grinder, Straight Grinder, Pencil Grinder, Drills