MusicNomad Tri-Beam

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3-in-1 Precision Ruler for Acoustic and Electric Guitars

For quickly checking the flatness of the fingerboard and the flatness of the frets
Helpful when adjusting the truss rod
The custom notch design is suitable for most electric and acoustic guitars
Suitable for scales between 24.625" to 25" and 25.34" to 25.625" and up to 22 frets
Unique triangular, three-walled design
Bend-free and easy to handle thanks to an innovative profile
Made of high-quality 6035-T5 aluminium
Accuracy tolerance of +/- 0,00125"/ft.
Extremely durable and abrasion-resistant blue anodised surface
Convenient hanging hole
Dimensions (L x W x H) 447 x 25.4 x 25.4 mm

30-Day Money-Back Guarantee

Available since July 2023
Item number 567056
Sales Unit 1 piece(s)

€49

-9% 30-days best price: €54

All prices incl. VAT

Sales Rank

in Guitar Tools

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51 Customer ratings

5 42 Customers 4 7 Customers 3 0 Customers 2 1 Customer 1 1 Customer

4.7 / 5

quality

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35 Reviews

Truss rod setup made easy

Fanasis 25.01.2026

I don't plan to work much on frets, that's for my guitar tech, he has to make a living. But this thing helps a lot with setting the truss rod almost 100% flat (maybe a hair less). Then you can do a slight adjustment to get it to your liking. Already set two guitars with it and they play almost to perfection. Looks and feels sturdy. Very happy overall.

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Good tool overall, not for pros

Giorgos Anastasopoulos 19.03.2026

The tool seems to be precise, well within specs and the idea of having 3 in 1 is brilliant. What i didn't like is that the edges of the notched sides are very sharp and can injure the fretboard easily, even when you are careful enough and experienced. I have been working as a guitar technician for more than 20 years and i didn't like it when i saw the fretboard scratched just by touching the notched side on it to make measurements with a filler. Nothing serious that I couldn't fix, but still my opinion is that it should be more refined in the edges of the notched sides. That said, I understand that production of such a ruler with that kind of attention to detail would have to cost triple the money but that doesn't mean I wouldn't buy it....I would definitely do! All in all, it's a good tool for hobbyists or for making measurements in your guitar, but not for professional work!

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Great tool

borja odriozola 21.11.2025

Its just a great tool to have to in your toolkit to check fret relative level and neck straightness

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A good product but pray for not having any issue with thomann

NicoFG 02.09.2024

The product is great but be careful of thomann, customer service lies all the time (when is the product gonna be in stock, a “manager will contact you back” which never happened), they live you for 2 months without any answer, do not respect the customer and can’t even take the time to apologise when they do a mistake…. The item is very well build and you can feel the quality but really pray for not having an issue with thomann…

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MusicNomad Tri-Beam

3-in-1 Precision Ruler for Acoustic and Electric Guitars

This is what customers who viewed this product bought

51 Customer ratings

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35 Reviews

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MusicNomad Tri-Beam

3-in-1 Precision Ruler for Acoustic and Electric Guitars

This is what customers who viewed this product bought

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51 Customer ratings

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35 Reviews

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