Detail 01
Relief gauge: .006, .008, and .010 inch
Provides three common neck-relief measurement references.

Independent shopping perspective
This Martin-focused kit pairs a relief gauge with a 5 mm wrench for guitars whose truss rod nuts are reached inside the soundhole. The gauge supplies .006, .008, and .010 inch reference measurements for checking relief across electric, acoustic, classical, and bass guitars. For the adjustment itself, the wrench is made for Martin soundhole-access truss rod nuts. Its ergonomic handle and rubber protective bumper help keep the tool controlled around the instrument while you work.


Strong match
Consider the trade-offs
What matters in use
Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.

Detail 01
Provides three common neck-relief measurement references.
Detail 02
Fits Martin truss rod nuts adjusted inside the soundhole and other brands using that size.
Final check

Product questions
Straight answers to the questions shoppers most often ask about this product.
The wrench is made for Martin truss rod nuts adjusted inside the soundhole.
Yes. The gauge can be used on other guitars and basses.
Reference
The complete catalog record, organized around the decisions musicians make when comparing gear.