Design: antique cast iron look with art deco pattern adding extra charm and elegance. Versatile: adjustable holder to fit 1.5" (38mm) and 1.9"(48mm) diameter poles. Widely used: suits 7-11 feet market umbrellas through a table or freestanding for porch and yard. Double-lock design: 1 adjustable rotary knobs for securing the umbrella to the base.