Why should fret crowning feel like punishment?
All other fret crowning files force you to death-grip. SharkFin doesn’t.
You can literally un-grip during the cutting stroke – and be relaxed on the back stroke – because you’re directly on top of the action, not gripping and steering from behind a long handle.
If you’ve done enough fretwork, you already know the moment – forearm tight, wrist getting cranky, dented fingertips, grip turning into a death-claw… and you’re only halfway through the fret job.
I know it because I’ve lived it.
Repetitive stress took my hands out of the game for quite a while. I was able to avoid surgery, but it took rehab, cortisone shots, and a whole lot of patience to earn my hands back. I promised myself two things: never again for me – and if I could help it, never – at all – for you.
That’s why SharkFin exists.
Here’s the counterintuitive truth: a typical file handle doesn’t give you leverage over the work – it gives the file leverage over your hand. The longer the handle, the less direct downforce and control you actually get at the teeth.
Here’s a thought experiment: If you were to double the file’s handle length, you’d also cut your effective downforce (and control) by 1/2. That’s why crowning often feels like you’re fighting the tool, not shaping the fret.
So we flipped the whole pre-conceived notion of what a fret crowning file is, on its head. And then set out to create what a fret crowning file can – and should be.
The new SharkFin file is the most advanced and accurate guitar fret file ever created, and the first crowning file worthy of being a FretGuru.
Avoid deep scratches in your frets and fingerboard with the FretGuru SharkFin's precisely shaped, sharp cutting teeth and smooth file edges, that give you total control, cutting accuracy and safety.
A precision tool designed to deliver exceptional fretwork results. Crafted with from high carbon European steel, which is heat treated and hardened to extreme levels, this file ensures smooth, clean, and accurate fret crowning, with superb control of your fret centerlines.
With the exclusive D.I.A. (Dual Integrated Arc) geometry, and the unique, soft, molded handle, this allows for precise shaping and crowning of frets, enabling luthiers and guitar technicians to achieve impeccable fretwork with ease.
Available in 2 sizes (identical sizing to the Dagger 2.0):
MD/LG/XL covers fret widths in the range of ~0.085” to (barely) ~0.110”. If you’re doing vintage or 6105 frets, this is the file to get.
LG/XL/XXL covers fret widths in the range of ~0.095” to ~0.118”+.
This is the file if you’re doing “modern” electric guitars. This size is also ideal if you have ~0.110” frets that have been significantly worn or leveled, in which case the XXL side is able to take a wide enough “bite” of the fret, in order to bring the sides in to a more clearly defined fret centerline.
**Both file file sizes share the same LG/XL/6100 side**
Whether you're leveling, crowning, or shaping frets, the revolutionary FretGuru SharkFin file file is an indispensable tool for achieving professional-grade fretwork and maintaining optimal playability.
Why should fret crowning feel like punishment?
All other fret crowning files force you to death-grip. SharkFin doesn’t.
You can literally un-grip during the cutting stroke – and be relaxed on the back stroke – because you’re directly on top of the action, not gripping and steering from behind a long handle.
If you’ve done enough fretwork, you already know the moment – forearm tight, wrist getting cranky, dented fingertips, grip turning into a death-claw… and you’re only halfway through the fret job.
I know it because I’ve lived it.
Repetitive stress took my hands out of the game for quite a while. I was able to avoid surgery, but it took rehab, cortisone shots, and a whole lot of patience to earn my hands back. I promised myself two things: never again for me – and if I could help it, never – at all – for you.
That’s why SharkFin exists.
Here’s the counterintuitive truth: a typical file handle doesn’t give you leverage over the work – it gives the file leverage over your hand. The longer the handle, the less direct downforce and control you actually get at the teeth.
Here’s a thought experiment: If you were to double the file’s handle length, you’d also cut your effective downforce (and control) by 1/2. That’s why crowning often feels like you’re fighting the tool, not shaping the fret.
So we flipped the whole pre-conceived notion of what a fret crowning file is, on its head. And then set out to create what a fret crowning file can – and should be.
The new SharkFin file is the most advanced and accurate guitar fret file ever created, and the first crowning file worthy of being a FretGuru.
Avoid deep scratches in your frets and fingerboard with the FretGuru SharkFin's precisely shaped, sharp cutting teeth and smooth file edges, that give you total control, cutting accuracy and safety.
A precision tool designed to deliver exceptional fretwork results. Crafted with from high carbon European steel, which is heat treated and hardened to extreme levels, this file ensures smooth, clean, and accurate fret crowning, with superb control of your fret centerlines.
With the exclusive D.I.A. (Dual Integrated Arc) geometry, and the unique, soft, molded handle, this allows for precise shaping and crowning of frets, enabling luthiers and guitar technicians to achieve impeccable fretwork with ease.
Available in 2 sizes (identical sizing to the Dagger 2.0):
MD/LG/XL covers fret widths in the range of ~0.085” to (barely) ~0.110”. If you’re doing vintage or 6105 frets, this is the file to get.
LG/XL/XXL covers fret widths in the range of ~0.095” to ~0.118”+.
This is the file if you’re doing “modern” electric guitars. This size is also ideal if you have ~0.110” frets that have been significantly worn or leveled, in which case the XXL side is able to take a wide enough “bite” of the fret, in order to bring the sides in to a more clearly defined fret centerline.
**Both file file sizes share the same LG/XL/6100 side**
Whether you're leveling, crowning, or shaping frets, the revolutionary FretGuru SharkFin file file is an indispensable tool for achieving professional-grade fretwork and maintaining optimal playability.
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