Upgraded aluminum alloy base umbrella holder, multiple fixed knobs to ensure no shaking, super strong windproof, hold your umbrella to protect you from sunshine or rain
Double knob design fixed umbrella handle, without any slippage, adjustable internal width by knob tightening. Only fit 1.8-inch max diameter round straight handle umbrellas(Not for bending, folding, irregular shape handle)
4 Bolts & hexagon clamp hold base mount in place, offers the tightest grip ever to keep your umbrella upright, fits on 0.7-1.3 inch diameter round / oval frames or square tube, comes with wrench tool easy install and removal (including installation instruction)
Can be adjust 180 degrees left or right, forward or backward with 2 knobs; the central rotating support shaft made of high-strength glass fiber reinforced plastics, won't crack or break
Wide application: use on golf push cart, mobility scooter, stroller, wheelchair, outdoor camping fishing chair, beach chair, etc.