Rickard’s innovative cycloidal gear design offers a 10:1 gear ratio on the 4 peghead tuners (vs 4:1 on standard planetary gears) for precision tuning. The 5th string peg is a standard Gotoh peg (13:1 ratio) with matching button. This set is nickel plated with ivoroid buttons, and they are designed to fit standard 3/8" diameter peghead holes.