Uploaded May 2020 | Updated September 2026, 3 hours ago

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The best, most advanced guitar machine head tuning technology is the new Ratio-Tuned Machine heads from Graph Tech Guitar Labs. Ratios are now installed on premium line electric and acoustic guitars on top brand manufacturers including Martin, Godin, Framus, Hagstrom and many more. And Ratios are so easy to install with patented Ratio InvisoMatch Mounting Plates. Simply select the installation plate design that matches the screw/pin hole location of your factory installed machine heads, then follow the three steps to install. No guessing, no drilling and you’ll be up and running in minutes

Visit: graphtech.com/collections/ratio-machine-heads-mounting-plates
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