C-1 Roughing cuts (cast iron and nonferrous materials)
C-2 General purpose (cast iron and nonferrous materials )
C-3 light finishing (cast iron and nonferrous materials )
C-4 Precision boring (cast iron and nonferrous materials )
C-5 Roughing cuts (steel)
C-6 general purpose (steel)
C-7 Finishing cuts (steel)
C-8 Precision boring (steel)