The Down River Deluxe Umbrella Holder fits on virtually any frame and allows you to pivot your umbrella angle to match the setting sun. The Deluxe Umbrella Holder clamps onto any 1 5/8 O.D. (NRS Size) or 1 7/8" O.D. (DRE Size) frame without having to disassemble the frame. Will fit umbrella shafts up to 1.5" in diameter.