At the time I ordered this, I had quite a few rings I needed to make, but it was on back order. I didn't cancel because I thought it would be very handy-and quick not having to do the math. My biggest problem is cutting straight. I found that this does help me get a very flush cut, but I don’t believe it sizes correctly. I have used it thee times and the rings have run small. Do the math just to double check the measurements. Also this only work on wire 1/2 wide or less.