The Kluson Revolution F-Mount 19:1 gear ratio tuning machine set. These state of the art, lightweight, diecast tuning machines are designed to directly retrofit the stamped "F" tuning machines that Fender uses on reissues of models from the CBS/Fender era currently being produced. We have added our three staggered-post feature to the Revolution F-mount tuning machine set to give you the proper string break over the nut. This allows you to bypass the string trees, reducing the number of friction points for better tuning stability while using the tremolo bridge or bending notes and gives a cleaner look to the headstock. On the non-locking model we have kept the original Kluson Safe-Ti-Posts to keep those sharp string ends out of the way and our locking version has the favorite knob on the back of the housing for a fast and convenient string change. All Kluson F-Mount tuning machines boast the 19:1 gear ratio for the ultimate in tuning stability. Uses the offset 2 screw mount with 10 mm push in bushings. All mounting hardware is included.