Cruz Tool Soundhole Truss Rod Wrench 5mm (fits primarily martin)
Acoustic guitar truss rods need adjustment just like electrics. Access is typically through the sound hole, sometimes through a brace to an unseen nuts. Cruz Tool's wrenches allow quick access to nuts primarily on Martin Guitars, with a precision ball-end tip for easy fit, extra length on both segments of the blade, and an oversized handle for confidence when making adjustments. Professional-grade.