StewMac Gauged Nut Slotting File Set for Mandolin - Medium Strings

In this review the StewMac Gauged Nut Slotting File Set for Mandolin is evaluated as a compact, purpose-built toolset for luthiers and hobbyists who work on mandolin nuts. The bottom line: this set provides four tempered edge-cut files sized to match medium gauge mandolin strings, making it straightforward to cut round-bottom slots that seat strings cleanly and reduce buzzing. For anyone repairing or building mandolins who needs predictable, repeatable slot widths, this set delivers the right gauges in one convenient package.

Key Features

• Matched Gauges: Includes four cutting widths (0.013in, 0.016in, 0.028in and 0.042in) so you can match the file to the string for accurate slot sizing.
• Round-Bottom Slots: Tempered edge-cut design produces round-bottom slots that help strings seat properly and minimize buzzing at the nut.
• Durable Material: Made of chrome-alloy steel for long life and consistent cutting performance through repeated use.
• Twin Cutting Edges: Each file has twin 4in cutting edges, giving generous usable length and a predictable cut orientation.
• Time Savings: Sold as a set, the files save time compared with sourcing individual gauges and include a built-in 10% savings over buying separately.

Who It's For

This set is aimed at busy repair shops and hobbyist luthiers who work on mandolins and need a small, reliable selection of nut files for medium gauge strings. The precise gauges make it suitable for routine nut shaping, setup work, and quick string-seat corrections.

It is less useful for those who exclusively work on other instruments or who require extra-fine or extra-heavy gauges not covered by the medium set; builders who need a wider range of sizes should consider supplementing with single files for light or heavy string sets.

Pros & Cons

Pros

• Accurate, industry-recommended gauges for medium mandolin strings that simplify matching file to string.
• Round-bottom cutting action reduces the risk of sharp notches that can bind or cut strings.
• Chrome-alloy steel and twin 4in cutting edges deliver durability and usable length for multiple jobs.

Cons

• Set covers only medium string gauges, so additional files are needed for light or heavy mandolin string sets.

Specifications

Brand	StewMac
Product type	Nut slotting file set for mandolin
Number of files	4
Cutting widths	0.013in, 0.016in, 0.028in, 0.042in
Cutting edge length	Twin 4in cutting edges
Material	Chrome-alloy steel, tempered

Our Verdict

The StewMac Gauged Nut Slotting File Set for Mandolin is a practical, well-specified kit for anyone doing setup and repair on mandolins with medium gauge strings. It offers durable construction, the correct gauges to avoid string buzz, and a useful round-bottom cut profile, making it good value for shop use or dedicated hobbyists who want consistent results.

Frequently Asked Questions

Can I use these files for other stringed instruments?
Yes, the files cut round-bottom slots and can work for similar nuts and saddles, but the gauges are chosen specifically for medium mandolin strings.

How should I match a file to a string?
Choose the file that matches the string gauge or one only a few thousandths wider; the set includes 0.013in, 0.016in, 0.028in and 0.042in files for medium strings.

Are the files durable for shop use?
Yes, they are made of tempered chrome-alloy steel with twin 4in cutting edges designed for repeated professional use.