The Dirty Hand Tools 6″ diameter compact auger takes the effort out of digging the right sized hole. A great addition to the Dirty Hand Tools Model 90 3-point tractor driven post hole digger. This 6″ auger typically used for Category 0 and 1 tractors. Pairs with the Dirty Hand Tools Model 90, and Model 100 post hole diggers (SKU 100623 and 100498) and tractor mounted post hole diggers that require an auger with a standard 2″ shaft. RanchEx brand augers are designed to fit Dirty Hand Tools and other manufacturer’s augers.