A combination of an anchor rail, in particular for setting in concrete, with a hammer head element, wherein the anchor rail has a rail which has a cross-section with a substantially uniform, c-shaped profile which extends along a longitudinal direction, wherein the profile has an inner side and an outer side and a, in particular substantially rectangular contour with a lower side, an upper side opposite the lower side, and two connecting sides which connect the upper side and the lower side (5, 6), wherein an opening of the C-shaped profile extends on the upper side in the longitudinal direction, wherein in particular at least two anchor bolts are arranged on the lower side of the rail, wherein the connecting sides are formed by side walls of the rail, wherein lips each extend on the upper side with a projection from the respective side wall to the opening, and wherein the hammer head element has a hammer head which can be inserted into the opening in a first orientation and can be brought into contact on the inner side of the lips with an upper side facing the lips in a second orientation, wherein the hammer head can be brought into contact with the inner side in a region of the lips facing the opening in an inserted, force-free state in which the hammer head does not cause a force-related deformation of the lips, while in a region of the lips facing the side walls, there is a distance between the respective lip and the head upper side, wherein the lips have a toothing on the inner side in a region facing the opening and no toothing in a region facing the side walls, and wherein the hammer head has teeth and, in the inserted, forceless state, the hammer head and the lips can only be brought into contact with the teeth and the toothing, characterized in that the hammer head, in a loaded state in which a working load acts on the hammer head, can be brought into contact in the region of the lips facing the side walls in addition to the region of the lips facing the opening, in that the hammer head causes a deformation of the lips. wherein the anchor rail has a rail which has a cross-section with a substantially uniform, c-shaped profile which extends along a longitudinal direction, wherein the profile has an inner side and an outer side and a, in particular substantially rectangular contour with a lower side, an upper side opposite the lower side, and two connecting sides which connect the upper side and the lower side (5, 6), wherein an opening of the C-shaped profile extends on the upper side in the longitudinal direction, wherein in particular at least two anchor bolts are arranged on the lower side of the rail, wherein the connecting sides are formed by side walls of the rail, wherein lips each extend on the upper side with a projection from the respective side wall to the opening, and wherein the hammer head element has a hammer head which can be inserted into the opening in a first orientation and can be brought into contact on the inner side of the lips with an upper side facing the lips in a second orientation, wherein the hammer head can be brought into contact with the inner side in a region of the lips facing the opening in an inserted, force-free state in which the hammer head does not cause a force-related deformation of the lips, while in a region of the lips facing the side walls, there is a distance between the respective lip and the head upper side, wherein the lips have a toothing on the inner side in a region facing the opening and no toothing in a region facing the side walls, and wherein the hammer head has teeth and, in the inserted, forceless state, the hammer head and the lips can only be brought into contact with the teeth and the toothing, characterized in that the hammer head, in a loaded state in which a working load acts on the hammer head, can be brought into contact in the region of the lips facing the side walls in addition to the region of the lips facing the opening, in that the hammer head causes a deformation of the lips.