A cleanly cut nut slot can make a guitar easier to tune and more comfortable to play. The right file starts with a size that suits the string and a shape that produces a rounded slot bottom.
These 10 sets cover electric and acoustic gauges, diamond-coated and conventional files, and lower-cost tools for occasional repairs. Use the buying guide below to narrow the choice to your instruments and workload.
Best 10 Nut Files for Guitar Luthiers 2 Picks for 2026
Light Electric Pick
MusicNomad MN668 Diamond Nut Files
- Six light-electric sizes, .010–.046 inches
- Round-profile, diamond-coated blades
- Aluminum case and removable blades
Best For: Light-gauge electric nut slots
Long-Blade Electric Option
- Three double-sided electric files
- Six sizes from .010 to .046 inches
- Rubber handles and PVC bag
Best For: Electric nut and bridge slotting with long files
Acoustic Gauge Pick
MusicNomad MN670 Diamond Nut Files
- Six acoustic sizes, .013–.056 inches
- Round-profile diamond-coated blades
- Engraved sizes and aluminum case
Best For: Light-to-medium acoustic string gauges
Three-File Electric Set
- Three double-sided electric files
- Six sizes from .010 to .046 inches
- Rubber handles and PVC carrying bag
Best For: Electric nut or bridge slots with tapered files
Diamond-Coated Pick
MusicNomad MN667 Super-Light Electric Nut Files
- Six super-light electric gauges
- Diamond-coated round blades
- Compact aluminum case
Best For: Electric guitars using the listed super-light string gauges
Broad-Size Kit
iLuiz 13-Size Nut File and Sandpaper Set
- 13 metric sizes from 0.4–1.6 mm
- Nine sanding sheets included
- ABS bridge-pin puller included
Best For: Multi-instrument work needing assorted metric sizes
Medium-Gauge Precision
StewMac Electric Nut Slotting Files
- Six specified 10–46-set gauges
- Round-bottom slot cutting
- Twin 4-inch cutting edges
Best For: Electric guitar setups matching the six listed file gauges
Versatile Shaping Set
Harrier 10-Piece Diamond-Coated File Set
- Ten varied file shapes
- For bone, wood, and soft metals
- Not gauge-specific
Best For: General guitar-part shaping and repair
Replaceable-Wire Pick
iLuiz Six-Size Light-String Nut File Set
- Six sizes from .010" to .046"
- Replaceable filing wires
- Pouch, box, and brush included
Best For: Light-string electric-guitar nut slotting
Light-Gauge Set
Six-Piece .009–.042 Electric Nut Files
- Six gauges from .009" to .042"
- Alloy-steel files
- No case listed
Best For: Matching .009–.042 light electric strings
Light Electric Pick – MusicNomad MN668 Diamond Nut Files
For shoppers comparing nut files for guitar luthiers 2, the MusicNomad MN668 is a six-file set sized for light electric strings: .010, .013, .017, .028, .036, and .046 inches. Its diamond-coated, round-profile blades are designed to cut and polish string-shaped slots.
Best For: Light-gauge electric guitar nut work when individual, string-matched files are the priority.
Pros:
- Six dedicated sizes for the listed light-electric string gauges.
- Diamond coating cuts on push and pull strokes and works on nylon, bone, TUSQ, and metal saddles.
- Ergonomic handles, protective tip bumpers, removable blades, and an aluminum storage case.
Cons:
- The included sizes may not match heavier or custom string sets.
- Choose a different set if you need acoustic-specific gauges.
The round cutting profile makes this the most direct choice here for light-electric string-shaped slots; check your actual gauges before ordering.
Among nut files for guitar luthiers 2, this three-piece electric-guitar set offers six cutting sizes across double-sided files: .010, .013, .017, .026, .036, and .046 inches. Its tapered, V-shaped edges are intended for nut and bridge slotting.
Best For: Electric-guitar work where long filing surfaces and a compact three-file set are appealing.
Pros:
- Six stated sizes on three double-sided files.
- Long filing surfaces and rubber handles for handling.
- Includes a PVC bag to help keep file edges separated.
Cons:
- V-shaped edges are not a round, string-shaped cutting profile.
- The listed gauges are aimed at electric guitar rather than acoustic string sets.
Consider this set if its six gauges match your strings and you prefer double-sided files; note the .026-inch size before choosing it over a set with a .028-inch file.
If your search for nut files for guitar luthiers 2 centers on acoustics, the MusicNomad MN670 supplies six sizes for light-to-medium acoustic strings: .013, .017, .024, .032, .042, and .056 inches. Its diamond-coated, round-profile blades are made to cut and polish slots.
Best For: Acoustic guitar nut work using the set’s listed light-to-medium string gauges.
Pros:
- Six acoustic-oriented sizes up to .056 inches.
- Round-profile diamond blades with laser-engraved size markings.
- Ergonomic handles and a compact aluminum case.
Cons:
- Not sized as a dedicated light-electric set.
- Six fixed sizes may not cover a custom string-gauge combination.
This is the acoustic-specific choice in the group. Match each file size against your intended strings, particularly if you use gauges outside a typical light-to-medium set.
The Holmer set is another three-file option for buyers comparing nut files for guitar luthiers 2. Its double-sided, tapered V-shaped edges provide six listed electric-guitar sizes: .010, .013, .017, .026, .036, and .046 inches.
Best For: Electric guitar nut or bridge slotting with a three-piece, double-sided kit.
Pros:
- Six stated cutting sizes across three files.
- Long filing surfaces and rubber handles.
- PVC carrying bag helps prevent the file edges from contacting each other.
Cons:
- V-shaped cutting edges differ from round-profile nut files.
- Its electric-guitar gauges do not cover the wider acoustic sizes listed in this roundup.
Holmer is a straightforward tapered-file choice if these exact sizes suit your strings. Check the .026-inch file size and V-shaped profile against the slots you intend to make.
Diamond-Coated Pick – MusicNomad MN667 Super-Light Electric Nut Files
Among nut files for guitar luthiers 2, the MusicNomad MN667 is a focused choice for electric guitars strung with the six super-light gauges listed for this set. Its diamond-coated, round-profile blades are designed to cut and polish nut slots.
Best For: Working on electric guitar nut slots matched to .010, .013, .017, .024, .032, and .042-inch strings.
Pros:
- Six laser-engraved blade sizes make gauge selection straightforward.
- Rigid, round blades are designed for smooth, string-shaped cuts.
- Works on listed nut and saddle materials, including bone, graphite, brass, and zinc.
- Includes a compact aluminum case.
Cons:
- The supplied gauges are specific to a super-light electric string set; check your string sizes before choosing it.
- Six sizes offer less gauge coverage than MusicNomad’s listed 16-piece set.
If your strings match these gauges, this set combines slot cutting and polishing in a portable kit. For different gauges, compare the other MusicNomad configurations first.
Broad-Size Kit – iLuiz 13-Size Nut File and Sandpaper Set
For shoppers comparing nut files for guitar luthiers 2, the iLuiz kit emphasizes size variety: 13 circular-cross-section stainless steel files span 0.4 to 1.6 mm. It also includes sandpaper and an ABS bridge-pin puller for related setup work.
Best For: Players working across different instruments who want multiple metric file sizes and basic polishing supplies in one kit.
Pros:
- Thirteen listed diameters provide a wide range of slotting options.
- Files have a 25 mm grinding length and 30 mm hilt.
- Includes nine sandpaper sheets in 240 and 320 grit.
- Includes an ABS pin puller.
Cons:
- Sizes are listed in millimeters, so compare them with your string gauges before filing.
- The included sandpaper covers only two stated grits.
This set makes sense when you value a range of file diameters and bundled accessories. Select a file against the string you’re fitting rather than assuming every size will suit a particular instrument.
Medium-Gauge Precision – StewMac Electric Nut Slotting Files
In a comparison of nut files for guitar luthiers 2, the StewMac set is the direct match for the listed medium-gauge electric string sizes. Its six tempered, edge-cut chrome alloy steel files are made to form round-bottom nut and saddle slots.
Best For: Slotting electric guitar nuts or saddles for the set’s .010, .013, .016, .028, .035, and .046-inch gauges.
Pros:
- Six individually specified file gauges help match slots to strings.
- Round-bottom cutting profile is intended to seat strings properly.
- Twin 4-inch cutting edges provide working length on each file.
- Chrome alloy steel construction with tempered cutting edges.
Cons:
- Only the six listed gauges are included, so other string sets may call for different files.
- No polishing supplies or storage case are listed in the supplied details.
Choose this set when its gauges match your electric strings and controlled slot cutting is the priority. Verify the individual string sizes, not just the overall 10–46 range, before buying.
Versatile Shaping Set – Harrier 10-Piece Diamond-Coated File Set
Harrier Guitar Nut Files Needle Fret Saddle Files Guitar Repair Luthier Tool Set of 10Pcs.
Check Price On AmazonFor shoppers comparing nut files for guitar luthiers 2, the Harrier set is a multipurpose shaping option rather than a set of string-gauge-specific slotting files. Its ten diamond-coated files come in varied profiles for work on nuts, saddles, bridges, frets, and other guitar parts.
Best For: Guitar repairers who want one compact set for general shaping and material removal.
Pros:
- Ten files offer shapes including flat, round, half-round, and triangle.
- Diamond-coated surfaces are intended for wood, bone, and soft metals such as brass.
- Anti-skid rubber handles provide a grip for detailed work.
Cons:
- No string-gauge-specific nut slot sizes are listed.
- The broad assortment may be less targeted if nut slotting is your only task.
Choose this set when versatility across repair jobs matters more than matching individual files to string gauges.
Replaceable-Wire Pick – iLuiz Six-Size Light-String Nut File Set
Among nut files for guitar luthiers 2, the iLuiz set stands out for its replaceable filing wires and six sizes aimed at light electric-guitar strings. Its aluminum-alloy frame holds wires designed to cut rounded-bottom nut slots, with different wire constructions for the thinner and thicker strings.
Best For: Light-string electric-guitar setups that call for dedicated, replaceable nut-slotting wires.
Pros:
- Includes 0.010″, 0.013″, 0.017″, 0.028″, 0.036″, and 0.046″ sizes.
- Replaceable wires are secured to the frame with stainless steel screws.
- Includes a storage pouch, wire box, and cleaning brush.
- Listed for common nut materials including nylon, bone, graphite, and TUSQ.
Cons:
- The supplied sizes are aimed at light strings, not every string gauge.
- Its wire-and-frame design involves swapping wires when changing sizes.
This is the most task-specific choice here if its six listed sizes match the strings you use; check those gauges before buying.
Light-Gauge Set – Six-Piece .009–.042 Electric Nut Files
If your search for nut files for guitar luthiers 2 centers on a .009–.042 electric-guitar string set, this six-piece kit provides individually gauged alloy-steel files. The listed sizes cover .009″, .011″, .016″, .024″, .032″, and .042″ for work on prepared nuts and saddles.
Best For: Electric-guitar repairers working with the six light-string gauges listed for this kit.
Pros:
- Six specified file sizes make the intended string-gauge range clear.
- Alloy-steel construction with a matte surface and plated ends.
- Each file measures approximately 5.12 inches long.
Cons:
- The listed gauges will not match every electric-guitar string set.
- No storage case or cleaning accessories are listed.
This straightforward set makes sense when its gauges match your strings; confirm the sizes you need before choosing it for other setups.
How We Picked the Best Nut Files for Guitar Luthiers 2
We focused on the buying decisions that matter at the bench: stated file sizes, electric or acoustic string coverage, cutting style, and whether a set is aimed at repeat setup work or occasional repairs. The selection includes gauged slotting files, diamond-coated options, tapered double-edge tools, and small needle-file kits. Those categories are not interchangeable: a kit with many pieces is not necessarily a better nut-slotting kit if its cutting diameters are unclear.
Product names and stated size ranges are useful starting points, not guarantees of slot width or cutting performance. Match any listed measurements against the strings you actually install before buying.
Quick Comparison
- Gauge-specific electric sets: MusicNomad MN667 and MN668, StewMac’s 10–46 set, iLuiz’s 0.010–0.046-inch set, and the 0.009–0.042-inch six-piece set are the most straightforward choices when their stated ranges match your strings.
- Acoustic-focused set: MusicNomad MN670 is the clearly identified acoustic option; check its individual file sizes against your preferred acoustic set.
- Tapered or mixed-use tools: The unbranded tapered set and Holmer three-piece set may suit broader repair tasks, but confirm the working width at the point you intend to use.
- General repair kits: The 13-size bridge/saddle kit and Harrier 10-piece kit offer assorted tools; check file cross-sections and dimensions before relying on them for precise nut slots.
Key Buying Factors for Nut Files for Guitar Luthiers 2
Start with Your String Gauges
For consistent nut work, choose files with stated sizes close to the strings you use most often. A slot must let its string move freely without excessive side-to-side play. If you regularly switch between light electric, heavier electric, acoustic, or bass strings, one narrowly targeted six-file set may not cover every job. Look at the individual file sizes, not just the gauge printed on the case.
Check the Cutting Profile
A purpose-made nut file should help form a rounded slot bottom that supports the string cleanly. Tapered and needle files can be useful for shaping or cleanup, but their effective width changes with position or technique. That makes them less convenient when you need repeatable, gauge-specific slots. Diamond-coated and conventional cutting files also feel different in use; whichever you choose, make small cuts and check progress often.
Think About Workflow and Storage
Clearly marked sizes save time when you move between strings. A protective case or bag helps keep files organized and cutting surfaces from contacting other tools. For frequent work, prioritize easy size identification and dependable coverage of your common string sets over accessory count.
Who Should Buy Which Nut Files for Guitar Luthiers 2?
Electric-guitar setup work: Start with a gauged electric set whose stated sizes match your usual strings; compare the light and super-light options carefully. Acoustic setups: Start with the acoustic-specific set, then verify its gauges. Occasional mixed repairs: A tapered or assorted kit may offer flexibility, but budget for dedicated gauged files if you need predictable final slots. If you work on many instruments, build coverage around your actual string inventory rather than expecting one kit to do everything.