SKU: 87839148634
open gear tuning machines

open gear tuning machines Ratio 3x3 Acoustic Open Back Guitar Tuners PRN-3411

Sale price$19.75 Regular price$21.94
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  • USA
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Ships within 48 hours · Estimated delivery Sep 2 - Sep 7

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Description

open gear tuning machines Ratio 3x3 Acoustic Open Back Guitar Tuners PRN-3411RATIO patented gear technology RATIO Calibrated Machine Heads incorporate different string gauges into the tuning equation. From Low E to High E 39: 1, 24: 1, 20: 1, 14: 1, 20: 1, 12: 1. We balanced the gear ratios to each string simplifying the tuning process. With RATIO, a half turn is a semi tone! Every string reacts the same to any tuning adjustment. Predictable, precise tuning, on every string. The PRN 3411 is a right handed set of open back

RATIO® patented gear technology
RATIO® - Calibrated Machine Heads incorporate different string gauges into the tuning equation.

From Low E to High E 39:1, 24:1, 20:1, 14:1, 20:1, 12:1.

We balanced the gear ratios to each string simplifying the tuning process.

With RATIO®, a half-turn is a semi-tone!

Every string reacts the same to any tuning adjustment. Predictable, precise tuning, on every string.

The PRN-3411 is a right-handed set of open-back RATIO® Calibrated Machine Heads for acoustic guitars that use 3+3 side tuners.

It has an intricate skeletonized button and finish selection.

Please note that our open-back guitar tuners are made to a vintage specification (11/32” / 8.71mm peghead holes), however, we do stock bushings with a larger outer diameter for modern day headstocks (13/32” / 10.23mm peghead holes) They are available upon special request [email protected] .Please check the specifications below:

Ratio Open Back Bushing Large:

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 87839148634

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Cara Clark
Belleville, US
★★★★★ 5
Ideal for bigger holiday meals
Color: White
Sturdy & great size for Easter, Thanksgiving, Christmas & potlucks or bigger meals
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Reviewed in the United States on May 15, 2026
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Coleen Kelly
Pawtucket, US
★★★★★ 5
Great Value
Color: White
Great to have on hand for family gatherings when you don’t want to deal with dishes.. large enough for meals or snacks and extremely durable.
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Reviewed in the United States on May 1, 2026
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Amazon Customer
Cuba, US
★★★★★ 5
Durable
Color: White
Durable Hold a lot
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Reviewed in the United States on April 19, 2026
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Terry Davis
Natrona Heights, US
★★★★★ 5
Sturdy plates
Color: White
Nice plates .
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Reviewed in the United States on May 31, 2026
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Arlene A.
Boise, US
★★★★★ 5
Good product
Color: White
Good quality
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Reviewed in the United States on May 29, 2026

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