Features: – Suitable for Martin guitar and specialized to the adjusting. – The function of adjustments is great and easy to use. – Made of steel material, super sturdy and durable ,not easy to break. br> – L-shape truss rod, convenient to insert the sound hole and adjust the neck. – This hexagonal wrench can be used to adjusted the guitar neck straight. Specifications: Item Type: Guitar Adjustment Wrench Material: Metal Color: Black Hex Size: 4MM/0.16″; 5MM/0.2″ Package Included: 1 x 4mm L wrench 1 x 5mm L wrench
Features
- Made of carbon steel, durable and highly wear-resistant.
- 4 & 5mm ball end guitar truss rod, Size:12.5cm x 7.5cm.
- For locking hexagonal screws on the bridge, adjusting the guitar neck.
- Two way L-shape truss rod adjusment, 90deg Bend no creases, no damage to material.
- Suitable for Martin acoustic guitar, If use it for other brands of guitars. Please confirm the size of truss rod.






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