Let this light duty, 12" diameter compact auger take the effort out of digging the right sized hole for the task at hand. A great addition to the Dirty Hand Tools Model 90 3-point tractor driven post hole digger. This auger typically used for Category 0 and 1 tractors. Can be used on 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.