Whether you are fencing, decking or drilling test holes these 2 man units are strong and robust. You can do up to 12″ hole with them but remember it is up to the operator to hold tight when you hit a root or rock. We suggest 10″ bit max for these because the drilling in our area is a bit rough. If the job is big or digging is tough you might consider the 1 man hydraulic unit or the mini loader with the auger attachment.