Mobile And Lockable Design: Easily reposition your umbrella with 4 built-in wheels,2 of which lock securely in place to keep the base stable when needed. Ideal for flexible shade coverage around patios, decks, and pool areas.Secure And Universal Fit: Compatible with most 6–12 ft patio umbrellas with poles 1.5–1.9 inches in diameter. Equipped with 2 adjustable tightening knobs and reinforced metal pins to keep your umbrella upright and secure.Wind-Resistant Performance: Designed to handle breezy days—simply fill the base with up to 123 lbs of sand or 37 liters of water for strong, balanced support that helps prevent tipping or shifting in windy conditions.Rugged And Weatherproof Construction: Made from durable, weather-resistant HDPE plastic and a heavy-duty steel pole tube to withstand outdoor elements. UV-protected and rust-resistant for long-lasting use in all seasons.Sleek And Practical Outdoor Use: With a modern black finish, this umbrella base blends seamlessly with your outdoor décor. Easily dismantled for off-season storage,perfect for patios, backyards, poolside lounges, or outdoor cafés.