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Item #:
59945573
Diamond SharkFin Fret Crowning File | Professional luthier fret repair tool, Top-down ergonomic control, D.I.A. geometry for razor-thin crowns
87% of respondents would recommend this to a friend
Item #:
59945573
XCD 282
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Order now and get it around Tuesday, September 08
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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
| Item Weight | 3.9 ounces (110.57 grams) |
| Product Dimensions (L x W x H) | 4.15 x 1.3 x 1.75 inches (10.5 x 3.3 x 4.4 cm) |
| Item model number | Diamond SharkFin |
| Date First Available | May 7, 2026 |
| Color Name | Diamond SharkFin V2 |
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.
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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.
Product Description
Diamond SharkFin Fret Crowning File | Professional luthier fret repair tool, Top-down ergonomic control, D.I.A. geometry for razor-thin crowns
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 Diamond SharkFin Editorial Review
The FretGuru Fret Crowning File is a highly rated, diamond dagger fret crowning tool that is suitable for use on electric, acoustic, and bass guitars with medium, large, or extra-large frets. Customers have praised its precision, ease of use, and value for money. The file is directional and works in the "push" direction. Customers recommend using a fine wire brush to keep the teeth clean. The file lasts a lifetime if it is cleaned and stored in a dry place. However, customers have noted that it takes more elbow grease to use on stainless steel frets, and the diamond coating may wear off after several uses.
Customer Reviews & Ratings
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Pros
- Highly rated for its precision and ease of use
- Suitable for use on electric, acoustic, and bass guitars with medium, large, or extra-large frets
- Cost-effective compared to other fret crowning tools on the market
- Long-lasting if it is cleaned and stored in a dry place
Cons
- May require more elbow grease to use on stainless steel frets
Platform Trust & Buyer Confidence
MA
Mohammad
Verified buyer
“Excellent quality and original too,when ubuy send original things I will appreciate that ,I very satisfied thank you”
23 July 2026 · via Trustpilot
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Chitra
Verified buyer
“The order and delivery progress was communicated very well. Package arrived within the estimated time. Products arrived as expected in good condition.”
22-Jul-26 · via Trustpilot
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kund
Verified buyer
“Good supply of products. Safe payment methods, and shipment worldwide! Genuine products.”
23-Jul-26 · via Trustpilot
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Onesi
Verified buyer
“Was my first time buying a product from Ubuy, but I found it so helpful. This is reliable. Gonna place a new order!”
22 July 2026 · via Trustpilot
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SAO JOHN
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23 July 2026 · via Trustpilot
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XCD 282
Order now and get it around Tuesday, September 08
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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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