post hole digger: 1,matched tractor power:30-75hp 2,hitch cat:1-2 3,gearbox:540RPM:1Ratio, operation RPM:300 POST HOLE DIGGERSMODELJW-PD45Tractor (hp)30~75HPAuger Flighting Thickness6mm4mmAuger Dia6",9",12",14",18",24"Auger Pipe63mm O.D.73mm O.D.Hitch Cat1-2Boom Tube89mm O.D.73mm O.D.Yoke Tube89mm O.D.73mm O.D.Driveline CatIII Shear bolt - StandardIII Radial pin clutch - OptionalGearbox540RPM4: ...