Heavy duty Earth Digger with Auger bit for drilling large diameter hole Earth Auger is used in agriculture purpose for digging holes in the soil. It make holes for plantation or for erecting poles. It is much easier to dig soil with this machine and the process takes less time. Its machine comes in petrol with differents size of bit. Hand Earth Auger can dig hole upto 3-5 feet depth depending on the diameter of the bit.