Holds your umbrella securely and evenly in place. Includes a coupler to allow it to fit both 1.5" (3.8cm) and 2" (4.8cm) diameter umbrella polesResin construction, last for years.Fully weather proof and rust resistant.Free from hassle of having to fill with sand.Includes a hand-turn knob for securing umbrella to the base. Ensuring the base and umbrella bond tightly under strong wind.Product Dimension: 44L × 44W × 32Hcm. Simple assembly required.