In different areas of the mechanical engineering industry the need occurs to lock the piston rod. The locking cylinders are the ideal solution for all areas where you have enormous loads and have to hold huge weights over a period of time. In addition, you can hold much higher forces with the cylinders than the power unit can produce. These cylinders are used to save energy as well as to fulfill safety standards. HYDROPNEU is offering you a lot of different systems. We will gladly give you advice for your specific needs.