Fender® locking tuners let you lock your strings at the tuning machines for maximum tuning stability.   Each package contains six die-cast tuners with removable tuner caps and bushings. 18:1 gear ratio design. Used on American Deluxe Series (USA) instruments. Can be retro-fitted to most US and Mexico made Stratocaster® and Telecaster® models.  Will not fit American Vintage Series (US).