For private use, anchor or hammock hooks from hardware stores are suitable. The hook length should be 160mm and the diameter more than 10mm. The cost lies between 3,- and 10,- Euro. Please clarify your ceiling material beforehand: Concrete or load-bearing wooden beam. For use with concrete, you also need suitable dowels. Here, we recommend the brand Fischer. If you install the swing hooks in load-bearing wooden beams, you do not need any dowels. Here, the anchor hooks are screwed directly into the wood.
IMPORTANT: The anchor hooks must always be screwed very deeply into the ceiling/beam. In no case may the screw thread peek out, otherwise there is a risk of breaking off.