Detail 01
Ratio gear ratios
Each string has an individually balanced ratio, with a half key turn equaling one semitone on every string.
Product detailSKU #1500000001047
Graph TechAcoustic 3+3 Skeleton Button Nickel
Independent shopping perspective
The Korena take
Built for 3+3 acoustic guitar headstocks, this nickel-finished set pairs open-back Ratio machine heads with skeleton buttons. Its gear ratios are balanced for the individual strings, so a half-turn at any key corresponds to a semitone change. In practice, that gives the tuning process a consistent turn-to-pitch relationship across the set, including strings that can otherwise feel less predictable.
Strong match
Who this is for
- Replacing tuners on an acoustic guitar that uses a 3+3 tuning-machine arrangement.
- Players who want each string to follow the same half-turn-per-semitone tuning change.
Consider the trade-offs
When to look elsewhere
- Acoustic guitars that do not use a 3+3 tuner layout.
What matters in use
The specifications, translated
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.
Detail 02
Nickel finish with skeleton buttons
The set has nickel-finished machine heads and skeleton-style buttons.
Final check
Know before you order
- 01Confirm that the acoustic guitar uses a 3+3 tuner layout.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01What does a half key turn do?
On these Ratio machine heads, each half key turn changes every string by one semitone.
02What guitar layout is this set for?
It is designed for an acoustic guitar that uses 3+3 tuners.
