Positions your feeder away from your deck railing for close viewing and a cleaner deck. Its durable, solid steel arm extends 18 inches from the deck rail and is powder coated with a black finish to resist weather. The Clamp-On Deck Hook fits onto horizontal railings up to 2In. thick to conveniently hang feeders and plants. Simply clamp the hook onto your deck rail by tightening the hand knob, with no tools needed!