HSS Gear Hobs: 1.Module: m1-m40 2.ClassAA , ClassA , ClassB 3.Single thread and right hand 4.Material: HSS/M2,M35,M42 HSS Gear Hobs:1.Gear hobs,spline hobs,standard gear hobs,sprocket hobs,worm gear hobs, serration hobs,timing pulley hobs 2.DIN/BS/JIS/GB Gear hobs,spline hobs,standard gear hobs,sprocket hobs,worm gear hobs, serration hobs,timing pulley hobs Stardard: DIN/BS/JIS/ASA/ ...