4mm 5mm Ball End Guitar Truss Rod Tool Allen Wrench for Martin Acoustic Guitar

Features: * brand new and high quality. *For martin or other guitar which couldn t reach it with a regular hex wrench truss rod adjustment. *Two way L-shape truss rod adjustment tool. *Made of carbon steel durable and highly wear-resistant. *Set for most kinds of acoustic guitar electric guitar and bass. *For locking hexagonal screws on the bridge adjusting the guitar neck. Specifications: Material: Carbon steel Weight: Approx. 42-66g / 1.5-2.3oz Length: Approx. 75+126mm / 3.0+5.0in Diameter: Approx. 4 or 5mm / 0.2in Optional Type: 4mm/5mm Package list: list 1: 1 x Guitar Wrench (Optional Type: 4mm/5mm) list 2: 2 x Guitar Wrench (4mm+5mm)