The wood splitter is suitable for the size reduction on the ground of trunk previously cut. It allows to reduce considerable the volume of logs and to speed up the consequent loading, chipping and shredding operation. The attachment is equipped with a hydraulic 360° rotation which limit the movement needs of the operating machine and increase the precision. The shape of the jaw and the sliding spheres reduce the blades effort of penetration into the trunk and facilitate the jaws exit during the opening phase.