PRE SHAVING GEAR HOBS ,PRE-GRIND GEAR HOBS ,WORM GEAR HOBS,SEMl-Toppling GEAR HOBS ,inserted BLADE GEAR HOB ,Fine Pltch Gear HOB Detailed Product DescriptionCIassA.B mm Module Outside Dia. Overall Length Hole Dia. 10 175 166 11 180 176 12 183 40 13 185 193 14 205 15 193 208 16 215 236 50 18 230 256 20 250 300 60 22 300 395 80 inserted BLADE GEAR HOBS