The tool (1, 11) has an active part (3), which is exposed to wear out action by contact with a group during ground work execution operation in a forward direction. A connection part (4) is mounted on the tool using a guiding groove (15) arranged in the tool. A locking wedge (18) locks a wear out parts (2, 12) in rotation and translation, where the wedge is mounted between the part (4) and the groove. An independent claim is also included for a body of ploughing tilling.
