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 DescriptionClass AA,A,B ModuIeOutside Dia. OveralI Hole Dia. Length O.15 O.20 10 O.25 O.30 8 O.35 25 0.40 15 0.50 0.60 O.70 20 0.80 25 20 8 0.30 0.35 15 0.40 O.50 0.60 32 13 O.70 0.80 20 0.90 1.00 Fine Pltch Gear Hobs