Diam*width*shank Grit Maxrpm 2*1*1/4 Coarse,Medium,Very fine 22.000 3*1/2*1/4 Coarse, Medium, Very fine 18.000 3*1*1/4 Coarse,Medium,Very fine 18.000 3*2*1/4 Coarse,Medium,Very fine 9.000 Characteristics: Ideal for use on steel,cast iron,stainless steel high alloys,aluminum and non-ferrous metal, Excellent on applications that required very light stock removal and finishing. Ideal for removing scratches,light deburring & blending Consistent finish throughout their long life.