The chisel leaves free under the wing a great height that allows him to carry out big depths favoring the accumulation of water in deep earth. When a grill, collides with a great obstacle (like it could be a stone of big dimensions) it jumps up and it returns to the work position, after having overcome the obstacle. The later cylinder allows him that the land is more compact, it also allows easily the regulation in the work height. In works of stubbles of corn and excessive overgrowth, we recommend the chisel of three lines, to avoid blockages. The result is a good work among the arms, without accumulation of organic matter.