Detail 01
Gear ratios: 39:1, 24:1, 20:1, 35:1, 20:1, 12:1
The ratios are assigned across the six strings so each responds consistently to adjustment.
Product detailSKU #1500000397828
Graph TechRatio 6-In-Line Electric Guitar Tuning Machine Heads Black 6 String
Independent shopping perspective
The Korena take
Built for a right-handed electric guitar with a six-in-line headstock, this black Ratio tuner set assigns a calibrated gear ratio to each string. The result is a uniform response when making tuning adjustments: a half-turn moves each string by one semitone. Two-pin casings allow direct mounting, while the included InvisoMatch plate sets are designed to use existing screw holes for a faster, more accurate installation on many guitars.
Strong match
Who this is for
- Replacing tuners on a right-handed six-string electric guitar with a six-in-line tuner layout.
- Installation projects where existing screw holes can be used with the included InvisoMatch plates.
Consider the trade-offs
When to look elsewhere
- Guitars without a six-in-line tuner configuration.
- Peg holes smaller than 13/32 in. (10 mm).
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
String-post diameter: 0.236 in. (6 mm)
Use this measurement when checking the existing tuner-post opening and hardware fit.
Detail 03
String-post length to string hole: 0.890 in. (22.6 mm)
A useful fit-check measurement when comparing the replacement tuners with the current posts.
Final check
Know before you order
- 01Confirm that the guitar is right-handed, uses six inline tuners, and has 13/32 in. (10 mm) peg holes.
- 02The two-pin casing can mount directly or work with the included four InvisoMatch plate sets.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01How much pitch change does a half-turn make?
With the Ratio calibration, a half-turn changes each string by one semitone.
02Are mounting plates included?
Yes. Four brushed-aluminum InvisoMatch mounting-plate sets are included.
Reference
Full specifications
The complete catalog record, organized around the decisions musicians make when comparing gear.
2 detailsPlayability
- String Post Diameter
- 0.236 inch (6mm)
- String Post Length to String Hole
- 0.890” (22.6mm)
1 detailsBody & build
- Color
- Black
1 detailsSize & weight
- Peg Holes Diameter Required
- 13/32 inch (10mm)
1 detailsOther
- Gear Ratio
- 39:1, 24:1, 20:1, 35:1, 20:1, 12:1
