Tool (1) for engagement in the ground including a holding portion (9) for turning of the tool around an axis of rotation (3), wherein an engagement portion (2) has a plurality of cutting blades (4) extending in directions from the holding portion (9) and being distributed around the axis of rotation (3) for pressing down into and engagement with the ground, said cutting blades each having a proximal end (5) and a distal free end (6). The cutting blades (4) have a respective front edge (7), for cutting action against the ground and a respective rear edge (8), wherein points on the front edges (7) are positioned at a greater distance from the axis of rotation (3) than points on the rear edges (8), and the cutting blades (4) are angled such that a distal portion of each rear edge is positioned in front of as seen in the turning direction (v), and essentially at the same distance from the axis of rotation (3) as a proximal portion thereof.