The "REDFINER" is equipped with the most advanced technologies, designed to effectively and efficiently refine and separate a vast variety of scrap metal and production waste. The internal geometries of the box, the grids and the hammers have been suitably studied and designed, optimising the parameters that influence the crushing phases, to obtain a strong comminution such as to allow not only the breaking of the connection joints but also the release of the components, for complete separation downstream of the refiner. A new, innovative and profitable way of recovering raw materials from "waste". A machine that fits easily into the reality of a scrap yard and guarantees a supply of high quality raw materials. The refined metal is separated, cleaned, compacted, uniform and with high density.