Fast delivery (2 working days after ordering). The swivel makes a very high-quality impression. Screws and anchors for ceiling installation are not there. It must be used flathead screws. We have 4 6x80 hex Eelstahlschrauben and 4 Fischer S8 dowels used for our concrete floor in the basement - keeps bombproof. All friction points we greased, then it is also audibly quieter. In addition, you can still use a suitable steel spring (depending on the weight of the punching bag) when the punching bag to very swinging. The function is far super - no Klemmer, Verhaker or other problems. We have a youth boxing bag (ScSPORTS youth Boxsset DG02) attached to our 10-year son.