Topeakmart 22lbs Umbrella Base Stand Heavy Duty Outdoor Patio Resin Umbrella Stand for Deck, Garden, Lawn - Black. Rotary knob: There is a rotary knob on the side of the center pole to settle the patio umbrella on this base stand, by simply turning the knob left and right, the patio umbrella can be fixed or detached from this outdoor umbrella base stand.
