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Graph Tech PRN-2721-C0 Ratio 6 In-Line Electric Guitar 2-pin Machine Heads - Mini Contemporary Style / Chrome

Tuners, 6 in Line, Classic Shape, 2-pin Casing, and Ratio Technology - Chrome
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Item ID: PRN2721C0
Graph Tech PRN-2721-C0 Ratio 6 In-Line Electric Guitar 2-pin Machine Heads - Mini Contemporary Style / Chrome
Price:$97 and 74 cents
$17.00 suggested monthly payments with 6 month financing‡

We Can Get It Fast!

While this isn't an item we normally stock, we can still get it to you as fast as possible due to our great relationship with Graph Tech. Go ahead and place your order and we'll follow up shortly to let you know when to expect it. Estimated May 2026.

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Graph Tech PRN-2721-C0 Ratio 6 In-Line Electric Guitar 2-pin Machine Heads - Mini Contemporary Style / Chrome
We Can Get It Fast!
Price:$97 and 74 cents
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This article was Written By

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Faster, More Accurate Tuning

Graph Tech's Ratio 6 In-Line Electric Guitar 2-pin Machine Heads offer a revolutionary new experience in ensuring your guitar is tuned more quickly and accurately compared to conventional tuner designs. Each tuner in the set boasts 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." Here at Sweetwater, we agree that they've nailed it with their Ratio Tuned Machine Heads.

Innovative Ratio technology

Though it's a simple idea, Graph Tech's Ratio technology completely changes the way you tune your guitar. All six strings 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 which string you are tuning, you'll notice that one full turn of the tuner equates to roughly one whole tone pitch change. The Ratio technology makes nailing your pitch much easier and faster — and you'll love how fast it is to get to Drop D and other alternate tunings.

Easy installation with no drilling

One of the greatest benefits of the Ratio Tuned Machine Head system is that they install onto your guitar's headstock without any drilling or other destructive procedures. They are also completely reversible. Graph Tech's InvisoMatch mounting plates ship with the tuners. The machine heads mount directly to those plates and aren't screwed into your instrument. As their name would suggest, the InvisoMatch mounting plates are completely hidden by the Ratio Tuned Machine Heads, offering a sleek, low-profile look.

Graph Tech: play better, sound better, perform better

Graph Tech has made it their personal mission to supply the products that will make your instrument play better, sound better, and perform better. From the company's popular String Saver saddles to their TUSQ string nuts that can be found on countless manufacturers' guitars, the company's products are a mainstay in the guitar and bass industry. Just about every player at Sweetwater owns something created by Graph Tech, because — like their mission statement promises — they never fail to improve our playing experience.

Graph Tech Ratio 6 In-Line Electric Guitar 2-pin Machine Heads - Mini Contemporary Style/Chrome Features:

  • Tuner machine heads that make tuning easier and faster
  • Each tuner reacts the same to the same amount of force
  • Mini contemporary design
  • 1 turn is approximately 1 whole tone
  • InvisoMatch mounting plates allow quick mounting with no extra screw holes

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

Extra peace of mind at no extra cost.

  • Save money with FREE parts and labor
  • Get back to making music with the industry's fastest turnaround time
  • Fix it the first time with our award-winning, factory-certified Service Department
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Tech Specs

  • Intended Instrument: Guitar
  • Configuration: 6-Inline
  • Finish: Chrome
  • Gear Ratio: 39:1, 24:1, 20:1, 35:1, 20:1, 12:1
  • Peg Diameter: 0.234" (peg), 0.385" (9.7mm peg hole)
  • Manufacturer Part Number: PRN-2721-C0

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