Longer allen wrench for guitar truss rod, ideal for various truss rod adjustments, including martin guitar. The increased length simplifies truss rod adjustments.
For adjusting the guitar neck and locking hexagonal screws on the bridge.
L-shaped truss rod adjustment tool with two-way functionality, convenient for inserting the sound hole and adjusting the neck.
Hex Size: 4mm/0.16", 5mm/0.2"; Overall Size: 125 x 75mm / 4.9" x 2.95".
Compatible with acoustic guitar, electric guitar, and bass.