... post hole digger for all tractors. Earth AugerMODELPOWER REQUIREMENTAugersDescribetionPD2015-30 HP6", 9", 12" AugersSized for subcompact tractorsPD2520- ... ",9",12",15",18",24",28",32",36"Diameter of drill pipe: 63mm or 73mmDiameter of Boom and Mast: 63mm73mm89mmGearbox:from ...