The BirdCam mounting arm gives you more options for setting up your BirdCam. Easily attaches to your bird feeder pole at multiple angles to provide a variety of unique and interesting shots. Requires no tools for set up and has a unique elbow joint to allow for angles of -60,-30,0,30, and 60 degrees. The BirdCam mounting arm is made for posts with an outside diameter of 0.5-1.5 inches. or to any post,wall, or tree.