Need to change the neck relief of your favorite Martin? This Allen Wrench will help you adjust your guitar's neck to achieve the amount of relief you desire.
This truss rod wrench can be used on the following models:

• Martin Modern Deluxe Series
• Martin SC-13E

Also available with a long handle.

Other models, please use the 5mm truss rod wrench.

Want to learn more about guitar truss rods? Read our Adjusting Your Truss Rod blog.