GHM-500A: General-purpose type                   GHM-800A: General-purpose type                 

GHM-500B: Precision type                                   GHM-800B: Precision type     

GHM-500C: Semi-automatic type                     GHM-800C: Semi-automatic type   

GHM-500D: Slight-tapered type

Standard accessories:

 1. Change gears: 1set

2. Tools for installation: 1set

3. GHM–500A/B/C/D hob arbors: Φ22, Φ27, Φ32mm

4. GHM–800A/B/C hob arbors: Φ27, Φ32, Φ40mm