Flagpole Deck Mount – Powder coated aluminum. Can be attached to concrete, wood or any horizontal surface. Great for boat docks, decks or patios. The holes in the base are 7/16″ in diameter, and the centers of the holes are 6 7/8″ apart side to side and top to bottom. Designed to work with your Titan Telescoping Flagpole. Attaching hardware is not included.