A 16 arm with locking hook that extends The Adjustable Deck Clamp Pole and Hanger Flower Garden Pole or Garden Pole. Galvanized powder coated steel construction is rust-resistant. Specifications:. Dimensions: 18 x 1.5 x 9 (assembled). Mounting: Attachment option to Adjustable Deck Clamp and Hanger (DCH) Flower Garden Pole (FGP) or Shepherds Envy Pole (SEP). Construction: Galvanized powder coated steel.