To squeeze this together is VERY HARD and VERY DIFFICULT. What I found is if you shave down the inner edge, JUST enough to allow for the device to snap shut together, yet keep equal pressure around the tubing, it will work, snap shut, and hold properly your pipe. You will have to use a small rattail file, or I used a Dremel with a small file head and CAREFULLY shaved that edge. Image show the edge to shave down all across from one side to the otherI should make another brand with this modification and make a fortune.
Rating: [4 of 5 Stars!]