Thickened Base: The base thickness directly determines the stability of the outdoor umbrella, especially in windy weather. We increased the base thickness to 4 mm, which is much stronger than the 2.5 mm thickness commonly used in the market. Even the Accessories Are Stainless Steel: The 4 fixed knobs and 8 screws are made of premium stainless steel, which completely avoids the embarrassment of rusting screws while the patio umbrella stands are not in the outdoor. Sturdy and Durable: High quality stainless steel material plus thickened powder coating makes our heavy duty umbrella cope with the harsh outdoor environment without rust and corrosion. And we provide you with an ultra-long , please rest . Space Optimization: If you don't want to use a heavy patio umbrella stands or base, and maximize the patio space and provide shade, our patio umbrella holder is your alternate, and our bracket can be mounted on vertical railing at any position. Note: Due to different production batches, the screw colors are random, don't accept the specified color. 4 mm Thickened Base Especially suitable for areas with high winds such as areas and high altitudes, the durability is much higher than that of a 2.5cm base. Curved Thread Reinforcement It fits more closely to the surface of the column than simply welding a nut, and the screws are easier to adjust. Larger Nylon Stainless Steel Fixed Knobs Refuse to use recycled old plastic because the torque of the old plastic is insufficient to cope with strong winds. Color: Black Material: metal Package Contents: 1 x Right Angle Umbrella Stand Kit Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.