holder with scale to set the correct position of the knurls for the diameter of the workpiece. With type MFCNC-14,5 only the cutting knurls sized 14,5x3x5 mm will fit, for milling knurls 14.5x3x5 mm and 21.5x5x8 mm, type AA, BR, BL article nr. 75.158 and 75.182, (excl.)