Vitrified Mounted Point Abrasive Material Aluminum Oxide Bond Type Vitrified Overall Dia 1/2 in Overall Thickness 1/2 in Shank Dia 1/4 in Grit 60 Shape W185 Shank Length 1 1/2 in Specification 38A60-P Operating Speed - Maximum 61 500 RPM Series Gemini Grade Medium Compatible Tool Type Die Grinder Straight Grinder