Vitrified Mounted Point Abrasive Material Ceramic Bond Type Vitrified Overall Dia 3/4 in Overall Thickness 2 in Shank Dia 1/4 in Grit 80 Shape W208 Shank Length 1 1/2 in Specification 3NQ80 Operating Speed - Maximum 18 750 RPM Series Quantum Grade Medium Compatible Tool Type Die Grinder Straight Grinder