The Forged-One.Piece Drill Roads come in one size, compatible with Vermeer D24x40 type machines.
They are made with highly resistant steel pipes, the ends of which are subjected first to forging, then to a thermal treatment in order to improve their resistance and resilience, and lastly to the ends machining in order to obtain male/female threaded joints. The production of Forged-one-piece drill rods completes the range of products offered by Colli Drill for directional drilling.