the container raises or lowers this angle does not change so that the operator controls the depth of cut and in any case the power consumption will be always optimal in other words the optimum cutting angle is obtained by the parallelogram mechanisms that allow the cutting blade does not change its angle of attack making the cut more efficient another important difference is that the general configuration of the scraper of the present invention comprises three main parts a joining or attaching element with the tractor and a pull arm the front part joins mechanically to the front part only by means of a parallelogram mechanism and the central part joins mechanically to the back part only by means of a parallelogram mechanism where the mechanisms of a parallelogram are equal or different but which in the preferred modality are equal a third and no less important difference is the fact that the expulsion of the material is accomplished by means of one or both methods known in the art such a configuration is not found up to the present invention in a single scraper actually the present invention provides a scraper that may eject the material by tilting the box material collection referred herein as a hinged box and or ejecting through the ejector included in the container or outer box a fourth difference with the scrapers of the state of the art is the fact that the container or external box can be lifted vertically through the parallelogram mechanisms this lift can be parallel to the horizontal or have a degree of tilt the following describes the method.