The Jack S has a welded stainless steel framework that sustains the aluminium skeleton of the stretcher and an efficient oil-pressured piston that allows a micrometrical height variation. The height variation is achieved by means of an ergonomic lever placed at the base and which conserves an excellent stability. The Jack S is robust, light, easily stored and transported. Four large wheels, two of which are equipped with positioning brakes, allow it's use also as a method of transport on uneven terrain. The use of stainless steel and the essential manoeuvrability ensure an efficient sanitization. Thanks to a hardy structure, it can also be used for the lifting of heavy loads during field construction.