Screw jack is one of the most used and cheap mechanism used for a wide variety of uses as lifting or moving any kind of load, even unbalanced ones. It can be used individually or in groups so to operate in perfect synchronisation. BP RIDUTTORI screw jacks are irreversible and don't need additional locking system. They are fully produced in our factory, and they guarantee high quality standard. The case is made of spheroidal cast iron or aluminium and the worm gears is made of special UNI 7816 18NCD5 iron, grounded on both the thread and shaft. It's possible to produce every NON STANDARD version to meet our customer request.