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Graph Tech Ratio Locking Tuned Machine Heads - 3+3 Contemporary Black

SKU: PRL-8311-B0
Original price $160.94
Current price $136.80
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Ratio tuning machines are one of the most significant upgrades for your guitar, second to replacing pickups or electronics. When you try Ratio for the first time, you will notice a substantial difference in the tuning precision of every string, especially when compared to (literally) any other tuner.

Thanks to the InvisoMatch mounting system, installation takes just minutes, requires no modifications for nearly every guitar, and is simple enough for anyone comfortable using a screwdriver & a small wrench to do.


This set of PRL-8311-B0 is finished in black with contemporary style buttons for installation on Les Paul or other style guitars which have 3 tuners on each side of the headstock; known as 3+3 or 3x3 configuration:

3+3 Configuration Headstock
Shown: 3+3 Vintage Gold w/ Premium InvisoMatch
Installation Plates for 90 Degree Screw Hole - Gold

A variety of standard un-finished aluminum InvisoMatch installation plates are included. However, we highly recommend using a set of premium color-matched plates, especially with the black and/or gold finished Ratio sets.

Premium InvisoMatch plates are only available for purchase separately


Ratio® 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. 

Ratio InvisoMatch Mounting Plates are the easiest approach to installing Ratio Tuned Machine Heads on your guitar. Simply select the installation plate design that matches the screw/pin hole location of your factory installed machine heads, then follow the three step process described in the product guide. You’ll be up and running within about seven minutes


Questions & Answers

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  • Will this fit an ESP LTD EC 256?

    Yes. These will drop right in on an LTD EC 256 with the included 90 degree screw hole installation plates.

  • I have a 2019 Schecter Diamond series C-1 platinum and looking for black locking tuners. Will these work?

    Yes, this set is compatable with the Schecter C-1 Platinum. They will drop right in as a direct replacement of the stock tuners with the included 90 degree screw hole installation plates.* 

    *The installation plates that come with these tuners are unfinished aluminum. If you would like matching black finished plates for your Schecter C-1 Platinum, they are avaialble as a seperate purchase at the link below: