Large flange has a durable, black powder-coat finish, and is perfect for mounting larger, wooden or recycled plastic bird feeders or houses. Will accommodate 7/8" to 1" diameter poles. Thumb screw secures flange plate to pole. Easily removed for cleaning of feeders. Zinc-plated screws included. Flat rectangular shape measures 3-1/4" x 5-5/8". It is made with 12 Gauge (.104) steel plate and "mig" welded for maximum strength. Center hole allows for easy mounting of seed tray screens or platform feeders that are designed to be mounted on the pole shaft beneath the feeder.