Detail 01
5mm size
This version is primarily for Martin guitars.
Product detailSKU #1439818610534
DunlopGrooveTech Sound Hole Truss Rod Wrench 5mm
Independent shopping perspective
The Korena take
For acoustic-guitar neck adjustments made through the sound hole, this 5mm GrooveTech wrench provides a purpose-built alternative to a standard hex key. Its blade is proportioned to enter the sound-hole opening and reach deeply recessed truss rod nuts, including ones located beyond bracing. The ball-end tip helps the tool seat in the nut, while the oversized screwdriver-style handle gives you a controlled grip when making the adjustment. The 5mm version is primarily intended for Martin guitars.
Strong match
Who this is for
- Reaching a recessed 5mm truss rod nut through an acoustic guitar’s sound hole.
- Adjusting a Martin guitar when its truss rod uses the 5mm size.
Consider the trade-offs
When to look elsewhere
- Guitars that require the 4mm truss rod wrench size.
What matters in use
The specifications, translated
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 02
Ball-end tip
Helps the wrench seat into the truss rod nut.
Detail 03
Oversized screwdriver-style handle
Provides a substantial handhold during adjustment.
Final check
Know before you order
- 01Confirm that the guitar requires a 5mm truss rod wrench before purchasing.
Product questions
Before you decide
Straight answers to the questions shoppers most often ask about this product.
01Why use this instead of a normal hex wrench?
It is designed to fit through an acoustic guitar’s sound-hole opening and reach recessed truss rod nuts.
02Which guitars is the 5mm version for?
The 5mm size is primarily for Martin guitars.
