The worm screw jack is the most appropriate tool for lifting or lowering significant loads, for thrust or traction operations of the same. It can be used either singly or in multiple units, mechanical screw jacks provide them in both manual and motorized version. Coupled by means of transmission shafts or other mechanical elements can ensure a perfect synchronism. The electric mechanical jacks have a load capacity ranging between 1 and 100 tons. There are several fields of application, from rubber to the steel industry where there is a need to lift significant weights.