Home
... Musical Instruments
Instrument Accessories
Guitar & Bass Accessories
Tools
MusicNomad
MusicNomad MN821 Tri-Beam 3 'n 1 Dual Notched Straightedge

MusicNomad MN821 Tri-Beam 3 'n 1 Dual Notched Straightedge main image

MusicNomad MN821 Tri-Beam 3 'n 1 Dual Notched Straightedge image 2

MusicNomad MN821 Tri-Beam 3 'n 1 Dual Notched Straightedge image 3

MusicNomad MN821 Tri-Beam 3 'n 1 Dual Notched Straightedge

^# 62

Equipboard's ranking is determined by analyzing factors such as professional artist usage, popularity, user ratings, reviews, and more.

$42.99 to $47.00

0 wishlisted

0 saved

Page last updated Jul 07, 2026

Pricing and availability

We compare 600+ stores and found this item at 6 stores. Prices updated July 6, 2026.

Store

Reviews

Price

4.5 (14)

$42.99

View Deal

$42.99

View Deal

4.7 (435)

$42.99

View Deal

$42.99

View Deal

$42.99

View Deal

4.7 (53)

$48.00 $47.00 $1.00 · All time low

View Deal

Price History

Based on price data from 5 merchants for "MusicNomad MN821 Tri-Beam 3 'n 1 Dual Notched Straightedge". Prices shown reflect NEW condition. Tracking began Apr 2, 2026.

^* Product prices and availability are updated by Equipboard every 24hrs and are subject to change. Equipboard may receive compensation for purchases made at participating retailers linked on this site. This compensation does not affect what products or prices are displayed, or the order of prices listed. For more information, please refer to our affiliate disclosure.

Description

Edit description

When it comes to guitar maintenance, precision is key, and the MusicNomad MN821 Tri-Beam 3 'n 1 Dual Notched Straightedge is a game-changer for both professional luthiers and home DIY enthusiasts. Its patent-pending triangular design offers three critical straightedge lengths—17.6", 12", and 6.5"—to isolate and identify fret and fingerboard issues effortlessly. Crafted from premium 6063-T5 aluminum, this tool boasts a durable, abrasion-resistant anodized finish that ensures it stands up to the rigors of daily use.

Not only does the Tri-Beam feature dual notched sides for precise fingerboard measurements, but it also includes a standard straightedge for checking fret levelness. Its precision-ground edges are accurate to an impressive tolerance of +/- .00125"/ft, making it an indispensable tool for any guitar tech’s toolkit. With SAE and metric ruler markings, plus 13 of the most popular guitar and bass fret scale lengths, you'll be able to quickly identify and address any playability issues. Designed with practicality in mind, the Tri-Beam even has a convenient hang hole for easy storage.

Whether you're adjusting a truss rod or ensuring perfectly level frets, the Tri-Beam 3 'n 1 is the ultimate tool for achieving impeccable fretboard accuracy.

Key Features:

Unique 3-wall triangular design with three critical straightedge lengths: 17.6", 12", and 6.5"
Dual notched sides for accurate fingerboard measurements; a standard edge for fret levelness
Precision-ground edges with an accuracy tolerance of +/- .00125"/ft
Made from premium 6063-T5 aluminum with an abrasion-resistant anodized finish
Includes SAE and metric ruler markings, plus 13 popular guitar and bass fret scale lengths
Convenient hang hole for easy storage

Videos

Add video

Alan's Reviews

MusicNomad Tri-Beam 3 'n 1 Dual Notched Straightedge Luthiers Tool for Guitar Necks

Alan's Reviews

Reviews

Add review

PROS

Well-crafted from extruded and machined aluminum, ensuring durability and precision
Triangular design provides three essential uses and maintains perfect rigidity
Features large, easily readable silkscreened labels for different neck sizes
Accommodates multiple guitar scales, including Fender, Gibson, and PRS
Highly praised for its incredible value for money compared to more expensive brands
Lightweight and comfortable to handle during setups and repairs
Includes a plain straight edge for versatile use
Recommended by users for both personal and professional guitar setups

CONS

Perceived as overpriced by some users considering the material used
Aluminum construction may be less durable than steel if dropped

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about MusicNomad MN821 Tri-Beam 3 'n 1 Dual Notched Straightedge.

Setup and maintenance

0 0

A 2 thousandths feeler gauge fits under all three sides of the straightedge on a granite countertop, suggesting possible minor deviations in flatness.
Source

Comparisons

0 0

A Lansam brand aluminum straightedge is cited as being "dead straight," providing a possible alternative for those unsatisfied with the MN821's precision.
Source