Vitrified Mounted Point, Abrasive Material Ceramic, Bond Type Vitrified, Overall Dia. 3/4 in, Overall Thickness 2 1/2 in, Shank Dia. 1/4 in, Grit 80, Shape A1, Primary Material Application Carbon Steel, Stainless Steel, Shank Length 1 1/2 in, Specification 3NQ80, Operating Speed - Maximum 20,960 RPM, Series Quantum 3NQ, Grade Medium, Compatible Tool Type Die Grinder, Flexible Shaft Grinder, Straight Grinder, Pencil Grinder, Drills