Bought a new cantilever patio shade. I need to have a cantilever patio market umbrella base stand with a square water or sand filled umbrella base with a U-shaped metal latch, and my shade has a pedal on the bottom so the shade can rotate. There is no problem with fully depressing the pedals when repositioning the shades. good results. Easy to fill, sturdy thick plastic. Heavy Duty With U-Shaped Metal Buckle Square Water or Sand Filled Umbrella Base Cantilever Patio Market Umbrella Base Stand is perfect. It takes about five 50-pound bags to fill all four weights. As for filling the container - use dry sand. All the sand in our big box store was slightly damp, so we spread it out on the driveway and left it out in the sun for about 15 minutes. Then we tape a plastic milk bottle with the bottom cut off to the opening and use a shovel to load the sand into a newly bought square water or sand filled umbrella base with a U-shaped metal lock cantilever patio market umbrella base holder. It took a few minutes to fill each base. relax and happy. Can also be filled with water in square water or sand filled umbrella base with U-shaped metal lock cantilever patio market umbrella base stand.