Round Nose Diamond Fret File

300-grit Narrow/Medium Item # 5182 In stock, ready to ship!
300-grit Wide/Jumbo Item # 5183 In stock, ready to ship!
150-grit Narrow/Medium Item # 5184 In stock, ready to ship!
150-grit Wide/Jumbo Item # 5185 In stock, ready to ship!
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Round Nose Diamond Fret File

A sorely missed shop favorite—now back and better than ever!
These round nose diamond files are a super fast way to restore a perfect crown to your freshly leveled frets.

Round nose for better control
These high-quality files were in our catalog long ago—and thanks to your requests they're back! The special rounded nose is great for getting extra clearance over the body while crowning, something square end files can't do. This design is the best of both worlds! The extra length also works fast, with just a few strokes you're done.

Long-lasting diamond coating
Each file edge is electro-coated with micro industrial diamonds. These super-tough abrasives round the frets more smoothly and stay sharp longer than standard toothed files.

Better control, faster work
Diamond particles cut on both the push and pull stroke (traditional toothed files only cut one way). This gives better control over your work, and the job goes much faster. They don't chatter or leave file marks, and the fret is smoother after crowning.

The 150-grit file is great for quickly removing material and restoring the crown, and the 300-grit file leaves you with a surface that easily polishes to a mirror-shine.

Double-edge covers more instruments
Each file has hollow-ground cutters in two sizes for crowning a variety of fretwire. Narrow/Medium files are for mandolin, banjo and guitar fretwire. Wide and Jumbo are for guitars and basses.


  • Made of tool steel
  • 150 or 300-grit diamond coated edge
  • Round nose for pin-point touch ups
  • Extra-long for faster crowning
  • Comfortable rubber-coated handle
  • File cutting edge: 6" (152.4mm)
  • Overall file size: 10" x 5/8" (254mm x 15.88mm)
Works on stainless frets, too!
All of our tools are suitable for use on stainless-steel fretwire*. Modern stainless-steel fretwire is known to be harder than the traditional nickel-silver blends, but our own shop experience indicates the wire does not cause premature wear of files or sandpapers.
*Excludes our original Fret Tang Nippers. We recommend our Deluxe Fret Tang Nippers for stainless-steel fretwire.
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Cancer and Reproductive Harm