This umbrella is very cheaply made.  It is all plastic, so it doesn’t hold in place.  With the slightest breeze, the umbrella moves all around.  At the suggestion of another reviewer, we had to drill a long screw and bolt into the pole to provide the locking functionality.  Also, there are 2 knobs that are supposed to stop it from moving, but when we tightened one it broke right off.  Again, another drill and screw was required.  We’ve only had the umbrella for about 2 weeks.  It looks great, but if you’re not handy to basically rebuild it, save your money and buy a better one.  Three stars was generous.