• Constructed of powder-coated steel, weather-resistant, anti-fade, rustproof, durable • 2 sizes of adapters, suitable for patio umbrella poles of 1.6"/ 1.9" diameter • The adjustable tightening knob helps secure the umbrella pole • The bottom anti-slip footpads help keep stable on uneven ground • The simple all-black appearance can perfectly blend into your outdoor decor • Easy and quick to set up, just rotate the pole and install 4 footpads • Widely used in the patio, poolside, backyard, balcony, commercial place, and so on • The flat umbrella base can be placed under the patio table