umbrella clamp umbrella holder clamp heavy duty umbrella clamp mount Wide application scenarios - Patio umbrella holder clampopening can clip anywhere you want,easily attach your patio umbrella, parasol to balcony,deck,pool deck,benches,tailgates,boats,poles,fences and more Fits railings from 0.8 to 2.7 inches - Outdoor umbrella holder clamp is made of heavy duty steel,black coating surface,strong oxidation resistance, not easy to rust. Adjustable knob fits 0.8-2.7 inches railing Flexible design - This heavy duty umbrella stand can accommodate umbrella poles with diameters ranging from 0.8 inches to 1.5 inches. The knobs on the deck railing grille are equipped with rubber gaskets, which not only firmly hold the railing but also prevent it from being scratched Tip: This umbrella clip stand is suitable for small to medium sized umbrellas, flags, fishing poles, flashlights or other small poles Space saving - Patio umbrella holder clamp designed to offer instant and convenient shade. Suitable for covering bbq grill, sporting events, outside work and other recreation Easy installation - No tools needed.The umbrella holder clip can be quickly mounted on railing,Just adjust both side long screws to hold or release the device fixedly