•Safety Guaranteed : It contatins check valves so that pulling force is kept for a certain time upon power failure, securing safety. •Easy Repair & Check : Thanks to easy access of chuck valves from outside, it is possible to repair and check them, while cylinder is attached to the equipment. •Leakage prevention design(Patent no.:0172805) : Cylinder body is designed with a leakage prevention structure to totally eliminate the possiblility of leaking. •Highest Draw Pull : As weight is reduced and draw pull is increased, it gurantees the best machining efficiency and stronger power.