Very Solid Speaker stand. Good Weight to it. Hold the speakers very well. The only draw back they send plastic washers for the screws. That is a terrible idea from the company. The plastic washer screws break immediately. For such good Speaker stands the company can do better and ship Metal washer screws with the package.
The alternative is go to home Depot and pick up 4 Metal Screws same size as the plastic ones. One go on top, the other go on the bottom. You will understand what i mean when you are putting it together. I actually use an Electric drill to screw it. It did the job.

So I had to take a chance on this one, due to a lot of vague information. I assume that, in order to be "universal" it had to be vague. For example, saying that this stand "adapts to your speakers" isn't really true. The only adapting it does is in the adjustment of the width of the base plate. So, yes, if your speakers aren't squared on the edges or base (like mine) you may have some challenges to overcome.

Fortunately there are plenty of places to screw through the base plate and into your speaker in order to stabilize it. Which is what I did (up through the bottom). Don't be so precious about your bookshelf speakers; a little screw isn't going to hurt them or the sound they produce. Stand assembly was quick and they feel very sturdy and secure. My JBL Arena B15 speakers are about 8 1/2" lbs. And they measure 7 inches wide, 5 inches deep, and 15 inches tall. There is a slight taper from the front to the back (that's where the base bracket has trouble fitting, and why I needed the screw).

I was worried that the speakers would be top-heavy with this stand, as I was getting close to the higher end of what this stand says it can handle. But that's not the case at all. These are very sturdy. And I'm on thick carpet with a pad underneath. I was worried that using a stand would be dangerous, with my two toddlers crashing around the house. But these feel very safe. I can tip them back and forth quite a bit and they don't fall.

Feeding the speaker wires through the center of the stand was easy as well. I didn't want the stand to be very tall since my speakers themselves are already tall, so I didn't use the bottom portion of the pipe assembly. They don't mention this, but you can have your stand be lower this way. Now my stand adjusts from about 20"-35" tall, instead of 31"-46". If I ever want them to be higher I can put the bottom pipe back in.

It was a good purchase. If I had to guess, I would say that their estimate of 11lbs per speaker is accurrate. My 8-1/2lb speakers feel great but I wouldn't go much heavier. And my size (7"x5"x15") is about at the top end as well. If your speakers are much bigger (they're probably not "bookshelf" anyway) move up to the next size.

Fue una buena compra ya que me ayudo mucho para un proyector que tengo y no usa demasiado lugar, muchas gracias

These stands seem to be of great quality and assembled in minutes with only a screwdriver. Exactly what I was looking for.

all above a 4 my Sony back speakers are 3and a half wide. had these over 10 Years (My solutions to its small width had 2" using wooded blocks to both sides) looks good sounds. works for me.
Now when I upgrade my system need not by Speakers stands.