Nut Slotting Gauge

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Nut Slotting Gauge For guitar and most instruments

For guitar and most instruments

Item # 2003
In stock, ready to ship!


Nut Slotting Gauge For bass

For bass

Item # 2006
In stock, ready to ship!


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Nut Slotting Gauge

A revolution in guitar setup! Precisely measures string heights, so you can cut accurate nut slots for consistent playability.

This device that will revolutionize the way you set up a guitar.
The Nut Slotting Gauge quickly and precisely measures string heights over the first fret. When filing nut slot depths, you see your results more accurately than ever before. No more guesswork or "eyeballing" the string heights, and no more searching for elusive combinations of feeler gauges. You can custom-tailor the playability with consistent, repeatable results.

At last! A precision tool for establishing string heights!

The Nut Slotting Gauge was designed by Don MacRostie here in our R & D shop. It features an easy to read dial indicator with adjustable zero point, and it's super accurate to .001". The machined brass base fits over the strings to rest on the fingerboard, and it works with most acoustic and electric guitars, mandolins and banjos. A larger brass base is machined to fit bass string spacings. Both have gently arched bottoms to follow most any fretboard radius. Instructions are included.

The Nut Slotting Gauge is included in this money-saving set: Nut Slotting Gauge and Neck Relief Gauge Set

Trade Secrets!

Putting the new Nut Slotting Gauge to work on a "burn victim" guitar

Dan Erlewine shows a before and after of a 1958 Gibson that's (barely) survived a house fire. It needs a new nut, and he's using the Nut Slotting Gauge to get it right the first time.

Product Instructions

Nut Slotting Gauge Instructions

How to determine nut slot depth with the Nut Slotting Gauge.

Customer Reviews

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  • 4.68 average rating from 68 reviews
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Nut slotting guage

(Customer's Reviews)

Also useful for measuring installed fret height when Fat Frets won't fit into the end slot in the digital caliper.

Use it over the fret and then on the fingerboard with no fret, difference is fret height


Great Tool

(Customer's Reviews)

I hesitated getting this for a couple of years. I kept going back and reading all the reviews but wasn't quite convinced that it would be accurate enough because a couple of reviewers were not getting consistent results. I should have gone with the majority.
I measured several guitars with it and double checked the results using feelers and I get the same results from both methods. I am confident that with this gauge I get the correct measurement every time within a fraction of a second. Far quicker than my old method.
It's a great quality tool which I use every day. Should have bought it a long time ago.


A go-to tool

(Customer's Reviews)

I use this all the time. I rely on it so much. I use it not only to set string height at the nut, but to check string height at all the frets, and at the 12th fret to set action height at the bridge - I can't imagine using a ruler to do that.

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Shown on page 6 of our latest catalog.