Faster and More Accurate Tuning Graph Tech Ratio Locking Tuners allow you to tune your guitar more quickly and accurately than conventional designs. Each tuner in the set sports a custom gear ratio that makes each machine head react the same — roughly one full turn per whole tone. Because each string reacts the same, not only is tuning a more pleasant experience, but nailing alternate tunings is a much faster process. Graph Tech's mission statement is "to improve your playing experience." And that's exactly what Graph Tech Ratio Locking Tuners deliver.Graph Tech's Ratio technology Though it's a simple idea, Graph Tech's Ratio technology completely changes the way you tune your guitar. All six tuners are outfitted with gear ratios that ensure you attain the same response from your wound low E string as you do your unwound high E. No matter what string you are tuning, you'll notice thatRatio Technology - BlackElectric Guitar TunersLocking MechanismContempary Shape3+3