I first thought this thing was a joke. A silly piece of steel wire with the guts of a valve stem crimped to the end. I had three sets of tires to mount, and bought this to give it a try. All I can say is- It works! It made it so easy to pull the stem through the wheel I was laughing about it. No more fishing around with your fingers trying to find the valve stem.
The only reason I did not give it 5 stars is because after the first use it came loose. That was not a problem though, once I tightend it back up, it worked great the rest of the day. Now it has a new home in my tool box next to my tire irons.