Vitrified Mounted Point Abrasive Material Aluminum Oxide Bond Type Vitrified Overall Dia 3/4 in Overall Thickness 1 1/8 in Shank Dia 1/4 in Grit 60 Shape A5 Primary Material Application Carbon Steel Shank Length 1 1/2 in Specification 38A M Operating Speed - Maximum 38 550 RPM Series Gemini 38A Grade Medium Compatible Tool Type Die Grinder Flexible Shaft Grinder Straight Grinder Pencil Grinder Drills