Device for loosening or tightening screw and similar screws in a hollow body in which there is a rotating piece loaded by spring must be put in connection with the tool and that is axially displaceable and can be made rotating provided with surfaces of command that work together with parts of the body guide while the control surfaces are formed by a groove of levacuyos two flanks create with the guiding parts of the body at least in the working area a unión with form closure between the rotating part and the body characterized because on the piece the rotating body that contains the mating surfaces rests on its end opposite the tool, a percussion bolt protruding from the body, and because another piece rotatably coupled with the other rotating part and supported on the body against a axial displacement. (Machine-translation by Google Translate, not legally binding)
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