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's made with 12 Gage (.104) steel plate and "mig" welded for maximum strength. Made in USA.