Directions are somewhat confusing.  There’s a small plastic sleeve that fits over the base post and main upright post that has a two holes in it, one is for a bolt, one is for an adjustment toggle.  When you put the two posts together there’s a hole for the bolt to fit into but nothing for the adjustment toggle to screw into.  Also didn’t realize the base was sold separately.  Cost of that is more than the umbrella itself costs.