Vitrified Mounted Point Abrasive Material Aluminum Oxide Bond Type Vitrified Overall Dia 3/16 in Overall Thickness 5/16 in Shank Dia 1/8 in Grit 60 Shape B45 Shank Length 1 1/2 in Specification 38A60-P Operating Speed - Maximum 104 250 RPM Series Gemini Grade Medium Compatible Tool Type Die Grinder Straight Grinder