Fret Slot Depth Gauge

  • 35 Reviews
  • Write a review

Be sure your fretwire will fit! Don't wait until after you've installed a fret to discover the slot wasn't quite deep enough!

Read more

Fret Slot Depth Gauge

Item # 5435
In stock, ready to ship!


Total: $0.00
Quantity: 20


Fret Slot Depth Gauge

Before you try to put frets in, make sure the slots are deep enough!

Subscribe to StewMac's channel on


Be sure your fretwire will fit! Don't wait until after you've installed a fret to discover the slot wasn't quite deep enough!

Dan Erlewine developed this remarkably handy "look-before-you-leap" gauge for quickly comparing the wire to the slot. Simply hold the flat edge against the fret tang, note the height of the tang against the reference lines, fit the appropriate curved edge into the slot, and compare the lines again.

The gauge is machined from .018" (.46mm) stainless steel for durability in the repair shop, and it fits into any fret slot. It's a big help for refret jobs (it fits bound fingerboards), for setting the depth stop on our adjustable fret slotting saw, and for setting the cutting height of our fret slotting table saw blade. The non-glare etched surface is easy to read, and the curved edges fit all popular radiused and flat fretboards.

Ratings & Reviews

Fret Slot Depth Gauge

  • Based on 35 Reviews
Displaying 3 of 4 1 2 3 4
Write a review

Simple but important tool

By D Graber from Vermont
(Customer's Reviews) Sunday, October 09, 2011

Works like a champ. Helps assure the fret slot is cleaned out, deep enough across the width, not just in spots.

Very handy!

By Dave Anderson Guitars from Port Richey,Fl.
(Customer's Reviews) Monday, August 29, 2011

I like the depth gauge for finding the depth of old slots.It's definitely an upgrade and quicker than using a rule.Thanks for another great fretting tool.

Very handy

By P Smith from Cary, NC
(Customer's Reviews) Saturday, June 25, 2011

While you can use other devices to perform the same function, I just found this to be pretty handy especially to measure the fret slot across the broader neck dimension especially at the ends of the slot towards the fretboard binding. Careful as it may not be thin enough to easily measure some slots that are very tight (.020-.021).

Fret Slot Depth Gauge

By MarcMaria from San Jose CA
(Customer's Reviews) Thursday, June 02, 2011

Great gadget - I used this along with a fret saw to get just the right depth. Worked great. Highly recommended so you don't over or under cut.

Fret Slot Depth Gauge

By Frank B from Youngstown, Ohio
(Customer's Reviews) Thursday, April 07, 2011

This is a super handy tool! The frets slots are cut while the board is still flat. Once the binding is glued on, and the radius is sanded onto the front, your fret slots are now shallower at each end! Now, you can't see in there to check, because the binding is in the way. What is the easy, and more importantly, accurate, way to determine if the fret slots are still deep enough? Fret slot gauge to the rescue! It's the easy way to verify that your fret slots are still deep enough, and not obstructed by glue, from putting on the bindings. It's far better that the various strips of assorted "stuff" I've used in the past for this job. Considering the very small price tag, this is a must have item if you make fret boards!

don't leave home without it

By DT Hawkins-Custom Guitar Tech from Clarksburg WV
(Customer's Reviews) Monday, March 07, 2011

fast and accurate really helps to make sure your frets slots are deep enough. Helps you follow the curve of the fret boards

Very handy tool.

By jLam Guitars from Australia
(Customer's Reviews) Thursday, February 24, 2011

It is a little on the small side but if it were any bigger I wouldn't be able to use it on other smaller instruments.

Great tool

By John G from Cleveland, OH
(Customer's Reviews) Friday, February 11, 2011

This tool can save you a lot of aggravation. Pressing a fret in a slot that is slightly too shallow can spoil your day and your fretboard! It is small and easy to lose, so put it in a safe place. Not small enough for mandolin boards, though. A scaled down version would be handy.

A Winner

By GOA Guitars from Bris Australia
(Customer's Reviews) Tuesday, January 04, 2011

A simple little tool that's worth its weight in GOLD

Small tool..big value

By JRE Productions from Plainfield, IL USA
(Customer's Reviews) Tuesday, October 26, 2010

I chuckled when I saw how small this tool was. Then the first day I used it, I found it was a great bang for the buck. I was able to locate a fret slot that had a slightly shallow area to it. This allowed me to resolve the issue BEFORE I pressed the fret into place. It saved me time and most importantly it saved me any damage from removing a new fret to resolve an unforeseen issue.

Displaying 3 of 4
1 2 3 4

Shown on page 14 of our latest catalog.