Double Action Truss Rod Adjustment

The double action (dual-function) system permits accurate adjustments to the neck in both directions.

1 Truss rod in 'flat' (no tension) position

2 Tightening the truss rod clockwise causes the neck to become increasingly convex (over) = less relief

3 Tightening the truss rod counter-clockwise causes the neck to become concave (under) = more relief