Adjust Your Martin Guitar's Truss Rod with Confidence

When adjusting your guitar's truss rod, it's imperative to use a truss rod wrench that fits perfectly. This CruzTOOLS GrooveTech Soundhole Truss Rod Wrench is a precision 5mm wrench that fits Martin guitars and other brands precisely. Its generous length makes it easy to reach the (often hidden) truss rod from the soundhole, while its oversize handle makes for easy adjustments. If you're serious about maintaining the playability of your acoustic guitar, we highly recommends the CruzTOOLS GrooveTech Soundhole Truss Rod Wrench.

CruzTOOLS GrooveTech Soundhole Truss Rod Wrench Features:

• 5mm wrench fits the majority of Martin guitars, and other brands as well
• Extra length helps you locate a hard-to-see truss rod within the soundhole
• Ball-end tip fits easily into the truss nut
• fits for Martin guitars and other brands precisely