?Function? Our Mount Patio Umbrella Stand Bracket base is flat suitable for the flat surface of any railing columns perfect for railing or deck in patio and courtyard not only protects you from rain and sun but save you space ?Quality Material? The Patio Umbrella Clamp made of quality 304 stainless steel material with a black coated finish that makes the umbrella has anti-corrosion and anti-rust properties very suitable for outdoor use ?Installation? 1.Mark your umbrella clamp mounting location 2. Drill screws to secure umbrella base 3. Insert the umbrella pole to tighten the knob ?Widely Use? The Outdoor Umbrella Deck Mount suitable for outdoor, garden, balcony, etc.is an ideal outdoor entertainment tool ?Quality Guarantee? All of our Patio Umbrella Side Holder meet the quality standard, If there is any problem, please feel free to contact us we will give you a satisfactory solution