Side mount flange plate. Powder coated heavy guage steel with a durable black finish. It accommodates side mount bluebird houses on straight, 1" Diameter Poles Thumb screw secures feeder to pole. Zinc plated mounting screws included. Flat Vertical plate measures 5-5/8" x 3-1/4". Made with 12 gauge (.104) plate and MIG welded for maximum strength.