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Item #:
59945573
FretGuru SharkFin Guitar Fret Crowning File | Professional Luthier Fret File | Top-Down Ergonomic Control | D.I.A. Geometry | Razor-Thin Crowns for
Item #:
59945573
MWK 210322
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Imported from USA store
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Order now and get it around Tuesday, July 21
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Faster Cut, Smoother Finish - The Dagger’s exclusive D.I.A. (Dual Integrated Arc) design gives you greater cutting control, perfect fret centerlines and a finer fret finish.
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What Stands Out
Ergonomic Design
The top-down ergonomic control ensures comfortable handling, allowing luthiers to work efficiently and reduce hand fatigue while crowning frets.
Precision Crowning
With razor-thin crowns, this file offers exceptional accuracy in fret crowning, resulting in improved playability and tone quality for both guitar and bass.
Versatile Sizing
Available in medium, large, and extra-large sizes, the fretguru sharkfin caters to various fret sizes, making it a go-to tool for all luthiers.
Product Details
- ERGONOMIC TOP-DOWN CONTROL: SharkFin places your hand directly above the cutting action, allowing controlled downforce without using a death grip – reducing fatigue during repetitive fret crowning work & providing true 1:1 cutting feedback
- RELAXED UN-GRIP CUTTING STROKE: Designed so you can ease your grip during the cutting stroke & stay relaxed on the back stroke helping prevent hand pain, wrist, forearm strain & the cumulative fatigue that makes fret crowning feel like punishment; comfort you'll notice on the first fret & appreciate even more on the final fret
- D.I.A. CUTTING GEOMETRY FOR PRECISION CROWNS: Proprietary Dual Integrated Arc (D.I.A.) geometry delivers exceptional control & predictability as the crown narrows prevent you kissing the fret top so your freshly leveled frets stay intact while you dial in razor-thin centerlines
- CLEAN CUTS READY-TO-POLISH FINISH: Chatter-free cutting leaves smooth crowns with minimal file marks so you sand less, preserve the crown & arrive at sparkling frets faster. The SharkFin design also solves the challenge of working on your upper frets with plenty of clearance for the guitar body & toggle switch
- BUILT FOR SERIOUS BENCH TIME: Made from high-carbon, heat-treated European steel for long life - consistent performance on nickel-silver & stainless frets; rounded, contoured, beveled edges and corners help protect fretboards & guitar tops from deep scratches and gouges
- PROFESSIONAL LUTHIER TOOL: Designed for luthiers, guitar techs, builders, and serious players who demand more control, less fatigue, and tighter fret crowns with cleaner results during guitar maintenance and repair work
- VERSATILE SIZE OPTIONS: Available in MD, LG, XL and XXL sizes to accommodate different fret dimensions on both guitar and bass instruments, ensuring compatibility with various fret size requirements
| Item Weight | 3.84 ounces (108.86 grams) |
| Product Dimensions (L x W x H) | 4.15 x 1.3 x 1.87 inches (10.5 x 3.3 x 4.7 cm) |
| Date First Available | February 28, 2026 |
| Body Material | Steel |
| Color Name | SHARKFIN-MD-LG |
| Material Type | Steel |
Who Should Buy?
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Professional Luthiers
Ideal for experienced luthiers seeking precision and control in fret crowning and finishing for various guitar types.
-
DIY Guitarists
Perfect for hobbyist guitar players wanting to maintain their instruments at home with high-quality fret filing tools.
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Fret Repair Shops
A great addition to repair shops that deal with fret leveling and crowning on electric, acoustic, and bass guitars.
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Beginner Players
Not suitable for beginners who lack experience with fret work and may prefer simpler tools for maintenance.
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Budget Shoppers
Users seeking inexpensive fret tools may find this product too costly given its high-end specifications and materials.
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Non-Guitar Users
Individuals without guitars or knowledge about fretwork will find this tool unnecessary and irrelevant to their needs.
Product Description
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
What is the exclusive D.I.A. cutting geometry?
Answer: It is a cutting design that provides better cutting control, accuracy, and finish than any other file. -
Question:
Why are precise fret centerlines important?
Answer: Precise fret centerlines are important for accurate fret crowning and better guitar tone. -
Question:
Are the edges of the file smooth and contoured?
Answer: Yes, the edges are designed to prevent damage to frets and the fretboard. -
Question:
Will this tool work for stainless steel frets?
Answer: Yes. It will work but may require more effort and may wear out the tool faster. -
Question:
Will it work on low narrow frets on mandolins?
Answer: The FretGuRu Crowning File is compatible with 6105 medium-large and 6100 large and extra frets. -
Question:
How long should it last if used on multiple necks?
Answer: With proper maintenance, it should last a lifetime. Regular cleaning with a brass brush and chalk and storing in a dry place will help prolong its lifespan. -
Question:
Is the medium/large channel smaller than the original FretGuRu Crowning File?
Answer: The channels may still be too big, causing annoyance to some users. -
Question:
Will this work on a Taylor with 6230 fret wire?
Answer: It should work, but success may vary based on individual skill level. The control provided by the Fret Guru may help achieve good results. -
Question:
Can beginners use this with a leveler for fretwork?
Answer: This file may not be suitable for beginners as it can easily clog and chatter if not used carefully. -
Question:
Will this work on a 5-string banjo?
Answer: Yes, it is compatible with a 5-string banjo. -
Question:
Will the smaller side of the file work on vintage tall frets on a new neck?
Answer: If the Fret Guru file cannot do the job on narrow vintage frets, it is unlikely that any other file will be more effective. -
Question:
Does this tool work for fret ends as well?
Answer: It is not recommended to use a fret crowning file for fret ends. It is better to use a dedicated fret end file for this purpose.
FretGuru Tools Editorial Review
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Customer Reviews & Ratings
10 customers ratings
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5 Star
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Mohd
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“The product received very good packaging & safe…Thank You”
16 June 2026 · via Trustpilot
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“Accurate delivery timing given”
16 June 2026 · via Trustpilot
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“Not madly expensive like I thought, and much quicker than promised.”
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6/7/2026 · via Trustpilot
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“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”
12 June 2026 · via Trustpilot
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MWK 210322
Order now and get it around Tuesday, July 21
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
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Features & Benefits
- New FretGuru file has improved performance
- Exclusive D.I.A. cutting geometry gives precise cutting control, accuracy, and finish
- Ideal-yet-elusive HOLY GRAIL for accurate fret crowning achieved
- Smooth beveled, contoured edges prevent damage to frets and fretboard
- Precisely leveled and crowned frets are crucial for great guitar tone
- Faster and easier to use, with greater efficiency
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