Gear HobsES-Cut HobsES-H-Cut HobsMilling CuttersGear Shaper CutterGear Shaving CutterMaster GearRotary CutterSpline RollersSpline Rollers Spline rollers are used for producing involute shafts & splines on Rolling Machines.Made from special materials, rollers are made in various sizes ZRM6, ZRM9 & ZRM12.