Fret ends poking your hand when you slide along the neck? That's fret sprout — and it shows up every autumn and winter, when heated indoor air dries out your fretboard. Here's why it happens and how to fix it yourself, cleanly and permanently.
Why your fret ends suddenly feel sharp
Wood moves with humidity. When the air gets dry — heating season, air conditioning, a move to a drier climate — your fretboard loses moisture and shrinks slightly across its width. The metal frets don't shrink. The result: fret ends that used to sit flush now protrude past the edge of the fretboard and catch your hand on every position shift. Players call it fret sprout; it's one of the most common setup complaints on new and imported guitars, and it can appear on any instrument, at any price point.
Two ways to fix it
Which tool you need depends on how far the ends protrude:
| Situation | Fix | Tool |
|---|---|---|
| Ends protrude along the whole neck; the bevel itself needs re-cutting | Re-bevel all fret ends in controlled passes at a consistent angle | FRTLZR® FretKata — sleigh-style beveling file that keeps the angle even across all frets |
| Bevel is fine, but individual fret ends feel sharp or square | Dress and round each fret end individually | FRTLZR® XXXL Fret End Dressing File — 150 mm diamond filing surface (300 grit) with a sliding ergonomic grip you position wherever you're working |
On a full-blown sprout you'll often do both: FretKata first for the bevel, then the XXXL file to soften and round each end. Both work on nickel silver, stainless steel and EVO gold frets.
Step-by-step
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Protect the fretboard
Mask the fretboard edge with low-tack tape, or use a fretboard protector where you're working. You'll be filing right at the wood line.
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Re-cut the bevel (if needed)
Run the FretKata along the fret ends in smooth, even strokes. The sleigh-style body keeps the beveling angle consistent from the first fret to the last — no freehand guesswork.
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Dress each fret end
With the XXXL file, round off each fret end individually with light strokes. Slide the grip along the 150 mm filing surface to whatever position gives you the best control — especially helpful on the frets near the body.
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Polish the ends
Finish the dressed ends with fine polishing grit so they feel glassy, not just safe. The Fret Polishing Kit Premium includes a dedicated Fret End Block with strips from 800 to 7000 grit for exactly this step.
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Prevent the next sprout
Keep the guitar at 45–55 % relative humidity — a case humidifier in winter costs little and prevents the shrinkage that causes sprout in the first place. Wipe the fretboard and restring.
FAQ
What is fret sprout?
Fret sprout is when fret ends protrude past the edge of a fretboard that has shrunk in dry air. The frets haven't moved — the wood has. It feels like a row of sharp edges along the neck.
Will the fret ends grow back out after filing?
No. Filing removes metal permanently. But if the guitar dries out further, the board can shrink more and expose the ends again — that's why humidity control (45–55 % RH) is the second half of the fix.
Is this safe to do myself?
Yes, with the fretboard masked and controlled tools. A guided beveling file and a fine diamond dressing file remove very little material per stroke — work slowly and check often. Deep fretwork (leveling, refretting) is a different job.
Why are my fret ends sharp on a brand-new guitar?
Guitars are often built in humid climates and shipped to drier ones. The fretboard shrinks in transit or during the first heating season — which is why sprout shows up even on brand-new instruments.
