Vitrified Mounted Point Abrasive Material Aluminum Oxide Bond Type Vitrified Overall Dia 5/16 in Overall Thickness 5/8 in Shank Dia 1/8 in Grit 60 Shape B53 Primary Material Application Carbon Steel Shank Length 1 1/2 in Specification 38A M Operating Speed - Maximum 67 070 RPM Series Gemini 38A Grade Medium Compatible Tool Type Die Grinder Flexible Shaft Grinder Straight Grinder Pencil Grinder Drills