C.F.A. Piles (Continuous Flight Auger) are continuous propeller poles whose characteristic resides in a continuous drilling to the bottom of the excavation by a propeller.

During the excavation phase, the propeller allows the removal of material, while the central tube, in the following phase, allows the pile to be filled. Where necessary, the drilling reinforcement is also included in the processing, with the insertion of a reinforcement cage inside the newly cast concrete.