... , optional style&color An auger is a drilling device, or drill bit, that usually includes a rotating helical screw blade called ... screw conveyor to remove the drilled out material. The rotation of the blade causes the material to move out of the hole being drilled.An auger ... holes for garden plantingWe have many different kinds of ground drill bits, such as 40mm,60mm,80mm,100mm,150mm,200mm,250mm ...