StewMac Gauged Nut Slotting File Set for Electric Guitar - Heavy

In this review of the StewMac Gauged Nut Slotting File Set for Electric Guitar, the bottom line is simple: this is a focused, professional set for anyone who regularly works with heavy gauge electric strings and needs reliable, round-bottom nut and saddle slots. The set of six tempered chrome-alloy files is clearly aimed at luthiers, guitar techs, and experienced players who want precision slotting without buzzing. The primary reason to buy is the matched gauges and twin 4-in cutting edges that make slotting fast, consistent, and repeatable.

Key Features

• Heavy gauge coverage: Six files spanning 0.013in to 0.056in give direct matches for most heavy electric string sets so you can pick the correct slot size quickly.
• Round-bottom slots: Tempered edge-cut geometry produces round-bottom slots that help strings seat properly in the nut and reduce unwanted buzzing.
• Twin 4-in cutting edges: Chrome alloy steel with twin 4-in edges provides smooth, efficient cutting for cleaner slots and longer tool life.
• Professional specification: The set is specified by StewMac tech advisors for heavy electric gauges, making it a dependable choice for shop work and precise setups.
• Time-saving kit: Buying the set supplies the common heavy gauges in one purchase and saves time compared with sourcing individual files.

Who It's For

This set is best suited to luthiers, guitar techs, and experienced players who perform setups or builds on electric guitars that use heavy gauge strings. If you frequently fit new nuts, re-slot nuts after refrets, or set up bridges where saddle slot profile matters, these files match the gauges you need for a proper fit.

Players who only change strings occasionally or who work exclusively with light gauges may find a smaller or different set more economical. Beginners with no experience filing nut slots should consider learning under a tech or using a single-file tool first, since correct slot depth and angle still require practice.

Pros & Cons

Pros

• Comprehensive heavy gauge range ensures a matched file for each string size from 0.013in to 0.056in.
• Tempered edge-cut design produces round-bottom slots that help eliminate buzzing when strings seat properly.
• Chrome-alloy steel with twin 4-in cutting edges feels durable and cuts smoothly for professional-quality results.
• Set purchase is convenient and cost-effective compared with buying files individually.

Cons

• Not necessary for users who only work with light gauge strings, so the full set may be overkill for casual players.
• Proper use requires some skill; inexperienced users risk cutting slots too deep or at the wrong angle without guided technique.

Specifications

Brand	StewMac
Set contents	Six nut slotting files: 0.013in, 0.020in, 0.024in, 0.035in, 0.046in, 0.056in
Intended strings	Heavy gauge electric guitar strings
Cutting edges	Twin 4-in cutting edges
Material	Chrome alloy steel, tempered edge-cut
Slot profile	Round-bottom slots for nuts and saddles

Our Verdict

The StewMac Gauged Nut Slotting File Set is a practical, well-specified kit for professionals and skilled hobbyists who work with heavy electric strings. It delivers matched gauges, durable chrome-alloy construction, and a geometry that promotes proper string seating and reduced buzz, making it good value for anyone doing regular nut and saddle work. Casual players using light gauges or those unfamiliar with slotting technique should consider a smaller kit or learn the method first.

Frequently Asked Questions

Can these files be used for acoustic guitar nuts?
They are designed for electric guitar nut and saddle slotting and the round-bottom profile can work on some acoustics, but they are specified for heavy electric gauges.

How do I choose the right file for a string?
Match the file size to the string gauge or choose a file no more than a few thousandths larger for a snug fit; the set includes the common heavy sizes for direct matching.

Are these files durable?
Yes, the chrome-alloy steel with tempered edge-cut and twin 4-in cutting edges is built for smooth cutting and long life under normal shop use.