FretGuru XT Guitar String Action Gauge Pro - Ultra-Precision MOAGG

In this review of the FretGuru XT Guitar String Action Gauge Pro, the bottom line is simple: this is a compact, workshop-ready gauge kit for anyone who wants repeatable accuracy when setting string action, checking fret wear, or measuring bridge and pickup spacing. Its single biggest strength is the expanded MOAGG 9-in-1 layout that combines a full-range fret rocker, dual string action rulers and the first dedicated bridge and pickup spacing ruler, making it a genuinely useful tool for both hobbyists and professional luthiers.

Key Features

• MOAGG 9-in-1 kit: Consolidates multiple setup tools into one pocket-friendly gauge so you can check fret height, nut height and string action without carrying separate rulers.
• Built bigger: Nearly 40% larger than the earlier model, the expanded format improves ergonomics and accuracy for bench use and makes reading measurements easier.
• Bridge and pickup spacing ruler: A first-of-its-kind, the spacing ruler removes guesswork when fitting bridges or pickups across varied standards and vintage layouts.
• Dual precision action rulers: Measures in 0.010 and 1/64 increments with deeply laser-etched markings to help you dial in consistent string height for guitar, bass, ukulele or mandolin.
• Depth and metric gauges: Includes depth checks in both inch and metric scales for assessing pickup-to-string distance and other setup clearances.

Who It's For

The FretGuru XT is aimed at luthiers, techs and serious hobbyists who perform regular setups or fret dressing and want a compact, multi-function gauge that replaces several single-use tools. Its accuracy and readable markings make it ideal for workshop use when paired with fret leveling kits and other precision tools.

Those who should look elsewhere are buyers who need digital readouts or instrument-specific proprietary gauges; the FretGuru XT is a precision mechanical tool and does not include electronic measurement or instrument-specific templates for nonstandard designs.

Pros & Cons

Pros

• Well-crafted, precision ground edges provide reliable and repeatable measurements for fret height and action.
• Highly functional spacing ruler eliminates guesswork for bridge and pickup placements across multiple standards.
• Pocket-friendly yet bench-ready size pairs well with existing fret leveling kits for a complete setup workflow.
• Easy-to-read, deeply laser-etched markings improve speed and reduce eye strain during setups.

Cons

• Mechanical gauge only, so users wanting digital readouts or absolute electronic calibration will need to supplement this tool.
• Expanded size is larger than the original, which may be less convenient for some minimalists who preferred the smaller format.

Specifications

Brand	FretGuru
Kit Type	MOAGG 9-in-1 Guitar Setup Kit
Measurements	Dual string action rulers in 0.010 and 1/64 increments; depth gauges in inch and metric
Special Feature	Bridge and pickup spacing ruler (exclusive)
Size	Nearly 40% larger than original format
Use Cases	Fret height/checker, fret rocker, bridge spacing, pickup spacing, nut height

Our Verdict

The FretGuru XT is a practical, value-packed tool for anyone who regularly sets up guitars or performs fret work. It replaces multiple single-purpose gauges with a single, well-made instrument and excels at removing guesswork from bridge and pickup spacing. For luthiers and diligent hobbyists who value precision and readability, it is a smart purchase that will save time and improve setup consistency.

Frequently Asked Questions

Can this gauge measure bass and mandolin string action?
Yes. The dual precision rulers and depth gauges are intended for guitar, bass, ukulele and mandolin measurements.

Does it include a fret rocker?
Yes. The expanded format contains a full-range fret rocker for checking fret height and fret wear across the neck.

Is this a digital tool?
No. The FretGuru XT is a precision mechanical gauge with deeply laser-etched markings rather than an electronic or digital readout.