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StewMac Z-File Fret Crowning File, Original Z-File - Two Diamond Edges - Shapes Both Sides At Once -Speeds Up Work!
Next generation fret files A whole new idea for crowning frets. Z-File fret crowning files trade; won't mess up your carefully-leveled fret tops because they only touch the sides of the frets. Won't cause string buzz. After you've leveled the frets for uniform height, your crowning file restores their rounded shape, leaving the thinnest possible line of leveled surface on top. This is when other crowning files can accidentally scrape the fret top, creating a buzzing low spot. Z-Files don't have this problem—because they don't touch the top of the fret. Z-File

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Price: $107.51