They are used almost throughout the capital goods industry in the field of lifting and conveying, for detachable connections, for tightening and locking. Due to the high forces with integrated safety function, they simplify complex application configurations while reducing functional elements to an absolute minimum. This offers reliable function and lowest susceptibility to interference. They work on the principle of form-locking in the final position, optionally in the extended or retracted piston rod end positions. The special series CYLOCK PT has a tolerance locking system that allows for compensating for elasticities during the manufacturing process from stroke to stroke.