I don't think this review reflects the QUALITY of the product. They appear to be well made. But they don't fit my application, so I couldn't use them. General. I've encountered a lot of confusion with matching pipe size to clamp size - inch to metric, expanded to rest, etc. I would suggest a "number system" you can use to match pipe to clamp. Because the clamps have such a low stretch range, they really NEED to be the right size. So be careful.