I'm sure most of you veterans already know this trick but maybe some of the newer guys may not. Trust me,it works BETTER than that $150 unit in my opinion and only cost about a half dollar!
<img src=http://www.jwknight.com/images/ring1.JPG>
<img src=http://www.jwknight.com/images/ring2.JPG>
<img src=http://www.jwknight.com/images/ring3.JPG>
<img src=http://www.jwknight.com/images/ring1.JPG>
<img src=http://www.jwknight.com/images/ring2.JPG>
<img src=http://www.jwknight.com/images/ring3.JPG>