A unique blend of resin and concrete makes this 26 lb. Patio Umbrella Base the perfect durable addition to your patio, deck, or pool side. Reliable and sturdy, its black, rust-resistant finish coordinates with most patio dining and bistro tables with umbrella holes. Use the easy tightening knob and locking mechanism to secure your patio umbrella pole to the base (not for use with freestanding umbrellas). For safety, it is recommended to crank down your umbrella and remove it from the base when not in use.