The invention relates to a spanner for hexagonal shaped objects, comprising an upper and lower jaw, which are respectively connected in a single-piece to the limb of a handle. The planar antenna comprises a dielectric slab and a fractal dipole antenna. The seat back is connected to the support via a rear link leg and via an intermediate link leg. The second branch pipes each include a valve and are selectively closed. The screen is interposed between the set of scissor rolls and the shear outtake manifold and is operative to permit undersized smaller pieces of a size less than a predetermined size to pass therethrough and to prevent oversized pieces of a size greater than a predetermined size from passing therethrough.