Surfing 6L6R Chrome 12 String Acoustic Guitar Machine Heads Tuning Pegs For 12 string guitar The overall length is 16cm, the distance between the poles is 26mm The distance between the two holes from center to center is 24mm, the distance between the first hole and the last hole is 147mm 6 on a plank(one for left, the other for right), the Guitar Tuning Pegs is great for guitar tuning Ideal to replace your old and dirty tuning pegs and great for guitar tuning.