GrooveTech Sound Hole Truss Rod Driver 5mm - Fits Primarily Martin

Acoustic guitar truss rods need adjustment just like electrics, but manufacturers sure don't make it easy. Access is typically through the sound hole, sometimes through a brace to unseen nuts. Our wrenches allow quick access to nuts on most makes and models of acoustics, with a precision ball-end tip for an easy fit, extra length on both segments of the blade, and an oversized handle for confidence when making adjustments. Professional-grade.