These work great with larger umbrellas that need added weight. Like that they come in pieces so it is easy to move them when needed.If your going to buy them buy two I will hold but not if it gets windyPurchased two sets to weigh down the umbrella. They don't come with straps to attach to the umbrella, so in super high winds they've slid off. I'm not sure if that's really the fault of the weights or the structure of the umbrella. Would buy again.You really should order all four for better support.What a wonderful improvement over using sand bags. These are so easy and do a great job holding the umbrella .works greatThought it was the complete set.does not hold up umbrella, umbrella fell several times