Multiple split internally threaded dowels made of brass. The specially knurled surface prevents co-rotation in the drill hole. Dowel designation indicates the required screw diameter. The attachment can be loosened and tightened without loosening the dowel. No setting tool is required. Corrosion-resistant fixing for interior and exterior use. Screw length Ls equals anchor length plus attachment thickness tfix. Suitable for all screws and threaded rods with metric thread. If necessary, slightly pre-spread brass anchors by screwing in the threaded screw. Push-through assembly and push-in assembly. For spacer assemblies in combination with threaded rods.