Care must be taken not to over-tighten the saddle clamps. Push new guitar strings through the saddle first with the ball end toward the nut so that you may fish the ball end under the string retainer to avoid damaging the finish. Strings should come off of the retainer toward the nut to assure that the guitar string is touching the entire surface of the nut in order to keep the string from changing pitch when installing the nut clamp. You are now ready to tighten the strings at each end.