Detail 01
10 mm required peg holes
Check the headstock’s peg-hole diameter before installation.
Product detailSKU #1500000398491
Graph TechRatio 6-In-Line Electric Locking Tuning Machine Heads With Staggered Posts Black 6 String
Sale
Independent shopping perspective
The Korena take
Built for right-handed six-string electric guitars with a six-in-line headstock, these black locking Ratio tuners pair string-specific gear ratios with staggered posts. A half-turn changes each string by a semitone, giving the set the same adjustment response across all six strings. The staggered posts remove the need for a string tree. Two-pin housings can be fitted directly or paired with the included InvisoMatch plates for installation using existing screw holes on most guitars.
Strong match
Who this is for
- Replacing locking tuners on a right-handed electric with six inline, staggered-post machine heads.
Consider the trade-offs
When to look elsewhere
- Three-per-side headstocks or left-handed guitar tuner layouts.
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
Staggered post lengths: 21 mm, 20 mm, and 19 mm
The post heights are staggered across the six-in-line set.
Detail 03
Gear ratios: 39:1, 24:1, 20:1, 35:1, 20:1, 12:1
Each string position has a separately calibrated ratio.
Final check
Know before you order
- 01Confirm a right-handed 6-in-line headstock with staggered posts and 10 mm peg holes.
- 02The staggered-post design eliminates the need for a string tree.
- 03Four brushed-aluminum InvisoMatch mounting-plate sets are included.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Do these require a string tree?
No. Their staggered posts eliminate the need for a string tree.
02Are these locking tuners?
Yes. They are a locking set of Ratio-calibrated machine heads for electric guitar.
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
- 0.827 inch (21mm) - 0.787 inch (20mm) - 0.748 inch (19mm)
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
