Patio Umbrella Stand Set Heavy Umbrella Metal Mounting Base 1. Reinforced and thickened base: The base is 4.1mm thick, and four reinforcement triangles are added to make our outdoor deck umbrella stand more indestructible even in hurricane weather. 2. High-quality materials: 2pcs extended fixing knobs, 4pcs expansion bolts, and 4pcs hexagonal screws are all made of high-quality metal, which completely avoids the embarrassment of screw rust, and the patio umbrella base bracket will not rust outdoors. 3. 4 stable modules: We specially added a module for fixing the bottom of the umbrella handle, plus another 3 PVC pipe sleeves, making the outdoor umbrella more stable and will not shake even in windy weather. The diameters of the 3 sleeves are 1.25 inches, 1.5 inches, and 1.9 inches respectively. 4. Unique design: The hollow bottom can easily cause the umbrella handle to rot or rust, especially on wet ground. Therefore, we sealed the bottom of the outdoor umbrella stand. 5. Widely compatible: This umbrella base can be used with beach umbrellas, traditional patio umbrellas, or huge patio umbrellas. Available in black, it will complement all of your outdoor furniture and allow for more space on your deck or patio.