I've two tripods. a very robust but unfortunately heavy of Montana with a very good and big ball head and a small, lightweight travel tripod with a very small and unfortunately also relatively unstable ball head. In order to mount the heavy and robust ball head on my travel tripod I bought this adapter. so cheap is so good it is. Much more can not tell unless you; Buy recommendation. My head is heavier ball securely and firmly on my small travel tripod. What more do you want.