Resin Mounted Point, Abrasive Material Zirconia Alumina, Bond Type Resin, Overall Dia. 1/2 in, Overall Thickness 2 in, Shank Dia. 1/4 in, Grit 30, Shape W189, Primary Material Application Stainless Steel, Carbon Steel, Shank Length 1 1/2 in, Specification CHARGER 30 GRIT, Operating Speed - Maximum 26,830 RPM, Series Charger NZ, Grade Extra Coarse, Compatible Tool Type Die Grinder, Flexible Shaft Grinder, Straight Grinder, Pencil Grinder, Drills