Graph Tech PRN-3422-N0 Ratio Acoustic Guitar Machine Heads, Open Back with Butter Bean Button - 3 + 3 - Nickel

- machine heads for acoustic guitar (western guitar)
- right-hand set
- open construction
- each machine head has its own gear ratio, calibrated for the respective string
- half turn of any key is a semi-tone pitch change for each string
- faster and more accurate tuning of each string
- ratio: E - 12:1, B - 20:1, G - 14:1, D - 20:1, A - 24:1, E - 39:1
- 6 pieces: 3x left, 3x right
- axis diameter without mounting sleeve: 6.0 mm (0.234)
- mounting diameter with mounting sleeve: 8.8 mm (0.346)
- weight ca. 25 g / 0.055 lbs (single)
- Butter Bean button
- nickel finish