Yaheetech 22lbs Heavy Duty Outdoor Umbrella Base, Bronze | Patio Umbrella Stand, 18" Round Resin Construction, All Weather for Deck, Poolside, Garden. 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.
