Vitrified Mounted Point Abrasive Material Ceramic Bond Type Vitrified Overall Dia 11/16 in Overall Thickness 1 1/4 in Shank Dia 1/4 in Grit 60 Shape A12 Shank Length 1 1/2 in Specification 3NQ60 Operating Speed - Maximum 48 000 RPM Series Quantum Grade Medium Compatible Tool Type Die Grinder Straight Grinder