[Multi-Purpose] Adjustable pole clamp kit provides even more versatility, Perfect for mounting torches, flagpoles, umbrellas, radio/TV antenna and other outdoor decorations. [3 Types of Assembly] The antenna pole clamp is Perfect for mounting round pipe (pole) to another round pipe (pole), square railings to another square railing or mounting round pipe (pole) to square railings. (The diameter range of round pipes is 1-1.8 inches, the diameter range of square pipes is 0-1.8 inches). [More Stable V-Shaped Jaw Blocks] The heavy-duty pole clamp uses jaw blocks with two long bolts (2.2 inches apart, 5.49 inches long) for a more solid installation to ensure the patio umbrella does not slip. [Sturdy Construction] The antenna pole to pole attachment kits are made of strong galvanized steel and , and designed to securely hold your patio umbrella. [Easy to Install and Move] Outdoor umbrella stand Comes with 2 small wrenches, no need for other tools that attach to most decks, balusters,