Set of 2 patio umbrella bases, sturdy base supports for patio umbrellas, patio railings

Adjustable knob: The patio umbrella holder features adjustable knobs, providing the flexibility to fit poles with diameters ranging from 7.6 to 5.1 cm. Enhanced stability and flexibility: This set of two outdoor umbrella clamps offers improved stability and flexibility, allowing you to adjust the height and securely hold the umbrella in place, even in windy conditions. Sturdy construction: Made of carbon steel with a stylish black powder-coated finish, this outdoor umbrella holder ensures durability and resists rust and corrosion. Space-saving and convenient: Unlike bulky umbrella holders, this clamp design maximizes space by securely attaching to various types of wooden railings. Easy to move: As the seasons change or for outdoor activities, this umbrella holder can be easily removed and moved to other locations. Perfect for events, barbecues, flagpoles, and more.