The 4400 series augers and extensions have a hexagonal connection. Due to the special types of bits and teeth, this series of augers offers excellent drilling performance in various soils. These teeth and bits are replaceable and protect the auger. The spiral shape is made of strong material and provides extra strength for the auger itself. Also, the space between the spirals is optimized, so that they raise the most ground with the least force. The 4400 series augers are suitable for the General Equipment M330H, M660H, the tractor hole digger and the Maruzen hydraulic hole diggers.