Automatic headlocks opening in the two directions. Raisable and easily dismountable. Provided in series with adjustable necks and detaching lever, adjustable ends at the 2 tips, individual lockings in each place, anti-passage for calves on all positions, intermediate reinforcement to seal, mobile collars reinforced by an anti-wear ring and pre-bored to receive two shock rubber absorbers. 7 places on 5 M. Poids: 147 kg. Other dimensions on request.