The invention relates to a bone fixation means (1) comprising: A) a longtitudinal shaft (2) with longtitudinal axis (3), and; B) an anchoring element (4), which can be fixed inside a bone and which has the same longitudinal axis (3) and is characterized in that; C) interacting means (5; 6) are provided on the shaft (2) and on the anchoring element (4), which either permit or prevent a rotation of the anchoring element (4) about the longitudinal axis (3) relative to the shaft (2).