Vitrified Mounted Point, Abrasive Material Ceramic, Bond Type Vitrified, Overall Dia. 1 in, Overall Thickness 1 in, Shank Dia. 1/4 in, Grit 80, Shape W220, Shank Length 1 1/2 in, Specification 3NQ80, Operating Speed - Maximum 25,500 RPM, Series Quantum, Grade Medium, Compatible Tool Type Die Grinder, Straight Grinder