Speed and perfect vertical accuracy are what you get with this high-torque, heavy-duty hydraulic auger. Its unique ""knuckle-joint"" design allows it to hang perfectly vertical, on flat or uneven terrain. The entire drive unit follows the bit into the hole, adding 30 cm more dig depth than a standard unit. This is the ideal tool for drilling holes for posts, piers, poles and trees in all kinds of soil conditions. Five models are available.