Grover Tuners #102-18N [aged]
Aged Grover Rotomatic Nickel Tuners (3L3R) for Gibson, Martin guitars (model 102-18N). Includes washers, bushings and wood screws.
The original Rotomatic with an improved higher ratio gearing. The 18:1 ratio provides for finer tuning and greater stability. The finer gears provide smoother tuning and a higher degree of backlash elimination. This new version of the Rotomatic uses the exact housing as the original; only the gearing has changed. Requires hole size of .391" (~25/64).