C.F. Martin & Co SOUND HOLE TRUSS ROD WRENCHES GTAW5 (5MM - PRIMARILY MARTIN)
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Manufacturer Information
Groovetech Cruz Tools
https://www.jimdunlop.com
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A simple tool for precise neck adjustment on acoustics
Acoustic guitars also require regular neck adjustments, just like their electric counterparts. The challenge is that manufacturers do not always make this operation easy: on many models, access to the adjustment nut is through the sound hole. This Groovetech Cruz Tools Truss Rod Wrench in 5 mm is designed to allow you to easily reach this nut and perform a clean adjustment, whether to correct high action, limit fret buzz, or fine-tune playability after a string gauge change.
Technical specifications
| Category | tooling | Instrument | acoustic |
| Type | truss rod adjustment wrench for acoustic guitar | Compatibility | "Special Martin Guitar" version (guitars requiring a 5 mm wrench, notably some Martin folk models) |
| Access | through the sound hole | Note | also available in a 4 mm model compatible with most brands |
| Size | 5 mm | ||
Questions frequently asked
Is this 5 mm wrench compatible with a Martin guitar?
Its 5 mm size is specified as special Martin in the product reference.
How to access the truss rod with this wrench?
Access is through the soundhole of the acoustic guitar. The wrench is designed to reach the adjustment nut located there.
Martin truss rod wrench 5 mm or 4 mm?
The size of this version is 5 mm. A 4 mm model is also available and advertised as compatible with most brands.
Can it be used after a string gauge change on a folk guitar?
Neck adjustment can be done after a string gauge change. This 5 mm wrench allows work on acoustic guitars whose nut is accessible through the soundhole. The adjustment mainly aims to fine-tune playability.
Does this wrench allow correcting a too high action?
The truss rod adjustment with this wrench can be used to correct a too high action or to limit buzzing on an acoustic guitar.
