First of all. Sorry for the potato phone pic. I bought a boat and it has this mount for something on the side. If you take one of the things and attach it to the part that is mounted to the boat, you can position the 'post' pretty much any direction. Whatever goes on the post did not come with the boat. The post is about an inch in diameter, plastic, and threaded. Is it for downrigger? outrigger? Fishing rod holder? Umbrella? What's it called or who made it. Somebody knows. Maybe I can buy whatever goes on it and use it.