-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 an