A 42-lb powder coated steel base holds a market or table umbrella upright on a deck, poolside patio or balcony. Two adapters fit poles measuring 1.6 in and 1.9 in, and an adjustable knob tightens against the shaft so the canopy does not spin in a breeze. The 25-in square footprint spreads that weight across a wide stance, while a low 14-in profile slides under a patio table without crowding knees. Four anti-slip footpads twist on in minutes and hold the base level on brick, tile or uneven pavers.