This flange will allow a 1 in. pole to fit through the center of it to mount a tray feeder somewhere on the middle of the pole, or it can be mounted to the bottom of a feeder and sit on the top of a 1 in. pole. This mounting flange allows a 1 in. pole to fit through the center of it to mount a tray feeder, or it can be mounted to the bottom of a feeder and sit on the top of a 1 in. pole. Screws included and made of black powder-coated heavy gauge steel for lasting durability. The pole mounting hardware is manufactured in our Wisconsin facility. Birds Choice currently operate out of a 50,000 sq. ft. manufacturing facility in Chilton, WI, employs 45 awesome team members, and remains committed to designing and creating the best darn products in our niches.