This tension bar for Jaguar and Jazzmaster tremolos increases the string pressure so the strings no longer jump off the saddles. You also don't have annoyng bridge noises anymore . The Buzz Stop fits 1:1 on standard Jaguar and Jazzmaster tremolos and is tightened with the existing front screws. The screw distance (center - center) should be 34 mm. No modifications of the instrument are required.