Precision Straightedges

  • 33 Reviews
  • Write a review

For accurate fretting and neck evaluation. Super accurate straightedges for precise fretting and neck work.

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Precision Straightedges 12" length

12" length

Item # 3849
In stock, ready to ship!


Precision Straightedges 18" length

18" length

Item # 3850
In stock, ready to ship!


Precision Straightedges 24" length

24" length

Item # 3799
In stock, ready to ship!


Precision Straightedges 36" length

36" length

Item # 3800
In stock, ready to ship!


Total: $0.00
Quantity: 20


For accurate fretting and neck evaluation. Super accurate straightedges for precise fretting and neck work.

Our straightedges are made specifically for checking neck straightness and relief, evaluating truss rod adjustments, and pinpointing high or low frets. Four versatile lengths are available for working on any fretted instrument, from mandolins to guitars to basses.

The narrow beveled edge allows easy and accurate viewing of the gap between the edge and the surface being checked. Made of durable stainless steel with a satin finish for easy marking with a pencil, each straightedge is precision-machined for accuracy to ±.0015" per foot.

These straightedges are also ideal for laying out projects on wood or paper, and for setting up table saws, jointers and other shop equipment.

#3850 18" Precision Straightedge is part of our Basic Setup Kit.

For acoustic guitars, our Neck Set Gauge is designed to attach to the #3799 24" Precision Straightedge.

Ratings & Reviews

Precision Straightedges

  • Based on 33 Reviews
Displaying 1 of 4 1 2 3 4
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Essential for...

By JohnL from UK
(Customer's Reviews) Thursday, January 22, 2015

...shooting a perfectly straight edge on tops and backs prior to joining.

12, 18, and 24!

By DeeCee from NY
(Customer's Reviews) Thursday, December 25, 2014

I have a 12, an 18, and a 24". I thought they'd be useful…but I've come to rely on them ALL THE TIME. Analysis tools are so important.

Must have for any woodworker!

By Martin YJ Lee from Korea
(Customer's Reviews) Sunday, May 18, 2014

This is not only must have for musical instrument maker, but also essential requirement for any woodworker. Very precision made, but longer one tends to be little flexible. Functionally, there is no problem but if it can maintain the weight and gain stiffness then it will be just perfect! Although I still give 5 star as i cannot be sure if it will be actually better if it is stiffer!

Template stock

By Kula Custom Ukes from Hilo, HI
(Customer's Reviews) Saturday, May 10, 2014

I have been using all the different lengths for years now, and have come to depend on these tools as a benchmark to check other "cheaper" straight edges. I will sometimes take one of the longer sized units to the hardware store and check other tools such as carpenters squares, drafting T bevels and such, to pick the straightest piece to buy, and use those for everyday use and I won't care if I ding or bang it up as I can just replace it with another cheap straight edge, and keep the Stew Mac versions stashed away, out of harms way, as I am old and clumsy!

Excellent quality

By Alex D from Saint-Petersburg, Russia
(Customer's Reviews) Tuesday, March 25, 2014

After purchasing 24" straightedge I checked it with expensive, industrial straightedge - Stewmac`s one is dead straght, as expected. Superior quality, will long for lifetime.

Super precision!

By martins from brazil
(Customer's Reviews) Friday, February 21, 2014

Nothing more accurate than the metal strips stewmac to find and solve mismatches frets.

Love it

By preetcher from Beaufort, NC
(Customer's Reviews) Saturday, February 08, 2014

It is a great tool to have.

Great Tool!

By Justin @ Urich Guitars from Pittsburgh, PA
(Customer's Reviews) Wednesday, January 29, 2014

Simple, great quality tool! I use it everyday in my shop!

Life its Better

By Carlos Giron from Ny
(Customer's Reviews) Tuesday, October 15, 2013

If you want to calibrate all types of guitar and some bass, certainly the 24 ", perfect tools, if you're about to buy this for your workshop, please purchase the 24" and 36 " Its Amazing, Thx Stewart-Macdonald.

What can you say about a straight edge?

By Michael T from UK
(Customer's Reviews) Saturday, October 05, 2013

This is a very high quality straight edge. It has a rust resistant finish and feels solid and dependable. Being a foot and half in length makes it perfect for guitar work. A very difficult to find length, in fact. I liked it so much, I bought two! Looks like it will last a lifetime.

Displaying 1 of 4
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Shown on page 16 of our latest catalog.