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. Includes washers, bushing and wood screws. Designed for 3x3 headstocks.