By combining higher horsepower engines with the reversibility, reliability and convenience of hydraulic drive, Little Beaver Hydraulic earth drills are ideal for drilling in rocky or heavy clay soils. With their extra torque, these powerful earth drills can handle augers up to 16" in diameter and can drill depths of up to 30' with 12" or smaller diameter augers, depending on soil conditions. A forward/reverse lever lets you remove the auger if it gets caught under an obstruction, such as a rock or tree root.