The CFA (Continue Flight Auger) pole is based on the use of a continuous welded propeller on a hollow shaft which, after drilling, when the soil is disassembled with a tool, receives the material excavated on the slopes of the propeller and transports it to the surface by compacting it simultaneously to the excavation walls. Main feature of piles with C.F.A. is the absence of stabilizing sludge or coating form tubes as well as the drastic reduction in the amount of extracted soil that rises along the propeller to the outside