Homewell 10' Complete Freestanding Outdoor Patio Umbrella (Black) All in one free standing 10' Patio Umbrella, Quality Waterproof Polyester Shade w/ Wind Flaps Air Vented Top without Flaps, Easily Adjustable Shade with Effortless Hand Crank Powder Coated Steel Pole and Ribs For recommended additional support, the base legs/feet include pre-drilled holes for the option to bolt down (bolts not included). As an alternative the legs/feet also come with flaps so you may place additional weight for added stability.