The proximal femoral nailing offers a good osteosynthesis for the femoral neck fractures, for the trochanteric fractures and for the various fractures of the upper third part. In some cases of the femoral neck fracture, it could be necessary to prevent the rotation of the head, in favour of it a double neck screw ensures the stability of the rotation. The combination of the two neck screws could provide an increased strength for the system.