MATERIAL: Made of sturdy iron, strong to hold up the umbrella. The galvanized surface makes the umbrella clamp have a strong oxidation resistance and not easy to rust.<br> SIZE: Fits the umbrella pole of 0-1.5 inches diameter, the max clampable thickness is 1.97 inches (Please measure deck thickness and umbrella pole diameter to check if it fits before order).<br> MAXIMIZING SPACE: The clamp-on design saves a lot of floor space on deck and keep the deck neat.<br> EASY TO SET UP: The umbrella holder clamps and tightens easily to the railing, can quickly move it from place to place without the need for tools. Comes with a rubber cover over tightening bolt to protect your rail and make the umbrella stand more stable for use.<br> PERFECT FOR: Bench, bleachers, deck railing, patio, pool, balcony, picnic table, fence, beach seat, add lots of shade with the umbrella.<br> Specifications:<br> Material: Iron.<br> Size: Fits the umbrella pole of 0-1.5 inches diameter.<br> Max Clampable Thickness: 1.97 inches.<br> Package Includes:1 Umbrella Clamp..Items from Sheng Xinshun's shop<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store