EFFORTLESS INSTALLATION: You can choose 1.5 inch or 1.9 inch umbrella rings according to your needs and assemble them tightly to keep the umbrella stable; after installation, tighten the M8 40mm/1.57inch threaded handle and the adjustment knob is fixed, prevent umbrellas from slipping. GOOD WIND RESISTANCE: The 1.5 inch and 1.9 inch outer umbrella rings can meet the diameter requirements of most umbrella poles, and the corresponding size will be an excellent tightening umbrella pole; effectively reduce the wind caused by umbrella shaking; can also protect your umbrella from scratches and dents caused by the friction of the umbrella pole. PRACTICAL FUNCTION: These umbrella base weights can help stabilize patio umbrellas, reducing and preventing scratches or dents on unstable umbrella poles. : The umbrella stand parts are mainly made of sturdy PP material, which is wear-resistant and extrusion-resistant, the thread screws are made of black PP and stainless steel, with good fastening performance. WIDE RANGE OF APPLICATIONS: You can place the umbrella base in outdoor areas, such as the beach, garden, balcony and swimming pool, to reduce the wind caused by the shaking of the umbrella, protect your umbrella, avoid scratches and dents from friction umbrella poles.Product : It helps the umbrella on the table to stand upright without shaking, no need to worry about tilting or shaking caused by the wind. It can stabilize the umbrella and reduce and prevent scratches and dents caused by friction. Keeps the umbrella centered on the table.