I found it didn’t work well with my wider primes but I got good results using a 50mm prime and my 28-70mm zoom.
There are 5 parts to this particular macro tube set. One piece attaches to the camera, then there are three sections in the middle for adjusting how close you can get, and finally the end that attaches to the lens. You can add or remove the middle rings to adjust how close you are able to get to the subject.
Keep in mind these tubes will narrow your lenses range. They are design only to get macro shots, so you won’t be able to turn around and shoot a wide shot without taking them off. For $10 this is fine. They are easy to remove and are a great addition to your lens bag.
The images below were shot with a 50mm lens. First without the tubes to show you how close the lens could get to the object on its own, then you will see the shot with the tubes on.