The PRL-8721-C0 is a set of Ratio Locking Tuned Machine Heads for an electric guitar that uses six in line tuners. It has a contemporary mini shaped button, has a two pin casing and is finished in chrome. The Simple Genius Behind The Ratio Tuned Machine Heads is it's utilization of its patented multi-gear technology. Every string on your guitar responds differently to tension. In other words, the plain G string jumps in pitch to small amounts of tension while the D string (with a thinner core) requires more turns on the machine head to get the same pitch change.Graph Tech has tuned the gear ratios to each string position so that every string responds the same to any tuning adjustment anywhere from 12:1 to 39:1 gear ratio. It's as dramatic as switching from a manual transmission on a car to an automatic. No more thinking about which string you are tuning! With Ratios, one turn is about one tone change on every string, making tuning, retuning and open tunings easier, quicker and more intuitive.Predictable, Precise Tuning, Retuning and Open TuningsRatio tuning feels natural. You don't have to think about which string you are tuning because they all feel and respond the same. No more overshooting the Low E or G. No more twisting away on the High E or D string. Open tunings have never been easier. String gauges such as light top, heavy bottom are no problem with Ratio; they still do the same precision tuning. FeatureEach set of Ratios include InvisoMatch installation plates for a quick and easy install without having to drill new holes!Locking for fast string changes and better tuning stabilityPatented Multi-gear Technology (12:1 to 39:1)High ratio gears feature a double envelope worm and a hardened steel gear to ensure durabilityPredictable, precise tuning, every stringGet yours today; with the security of our many decades of experience and Sam Ash Direct efficient order processing, your satisfaction is guaranteed!
This item is available at