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

• Martin Modern Deluxe Series
• Martin SC-13E

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

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