Mounted Point Abrasive Material Aluminum Oxide Overall Dia 1 in Overall Thickness 2 3/4 in Shank Dia 1/4 in Grit 36 Shape A3 Primary Material Application Aluminum Carbon Steel Stainless Steel Operating Speed - Maximum 15 530 RPM Series 32A Grade Extra Coarse Compatible Tool Type Die Grinder Flexible Shaft Grinder Straight Grinder Pencil Grinder Drills