Vitrified Mounted Point Abrasive Material Ceramic Bond Type Vitrified Overall Dia 5/8 in Overall Thickness Not Applicable Shank Dia 1/4 in Grit 80 Shape A26 Shank Length 1 1/2 in Specification 3NQ80 Operating Speed - Maximum 61 120 RPM Series Quantum Grade Medium Compatible Tool Type Die Grinder Straight Grinder