Tractor Model Single Post Hole Digger RKJ-12 Heavy duty tubular frames, Category- I hitch, Gear Box compatible with 35 HP - 55 HP max. with 3:1 ratio, Output Shaft = 2” (50mm), Input RPM= 540 RPM, High Tensile Fasteners, Shear-pin protection device, Auger length = 42”, Auger Sizes 12” , Semi-Double Flighting.