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 Rotomatics uses the exact housing as the original. Only the gearing has changed. Includes washers, bushings, and wood screws. 3x3 format for 3 per side headstocks.  .391 hole size.