StewMac Double-edge Fret File for Wide/Jumbo Fretwire - Precise

In this review the StewMac Double-edge Fret File is evaluated as a practical, workshop-ready tool for luthiers and hobbyists who need accurate fret recrowning without a big investment. The bottom line: this file delivers predictable, repeatable crowns on wide and jumbo fretwire thanks to its precision-cut teeth and two hollow-ground cutting edges, making it a smart starting tool for anyone building or refretting instruments. It is compact, comfortable to hold, and handles modern stainless frets according to StewMac's shop experience.

Key Features

• Precision-cut teeth: The file's tooth profile gives controlled material removal for consistent fret shaping and less chance of uneven crowns.
• Two hollow-ground edges: Having two different 4' cutting edges lets the same file recrown both wide and jumbo fretwire sizes without swapping tools.
• Durable tool-steel construction: Made of hardened tool-steel so the file keeps its cutting geometry under regular workshop use.
• Rubber-coated handle: The rubberized grip improves comfort during repeated passes and reduces hand fatigue during longer jobs.
• Works on stainless frets: Although stainless is harder, shop experience indicates this file performs without premature wear on typical fretwire.

Who It's For

This file is aimed at luthiers, repair techs, and serious DIYers who regularly work on guitars and basses with wide or jumbo fretwire. It is particularly useful for shops that want a reliable, low-cost crowning tool that covers two common large-wire profiles without buying multiple specialty files.

Those seeking a full professional crowning system with a wide range of radii, interchangeable guides, or powered crowning equipment should look at larger kits. Likewise, casual players who only occasionally do tiny fret touchups may prefer a cheaper single-edge file or to leave work to a tech.

Pros & Cons

Pros

• Precision-cut teeth give predictable crowning for clean, consistent results.
• Two hollow-ground 4' edges cover both wide and jumbo fretwire sizes in one tool.
• Durable tool-steel construction and rubber-coated handle make it comfortable and long-lasting.

Cons

• Not a complete crowning system with guides or multiple radii, so shops needing every possible profile may require additional tools.

Specifications

Our Verdict

The StewMac Double-edge Fret File is a solid, economical choice for luthiers and dedicated hobbyists who need reliable crowning for wide and jumbo frets. It gives accurate shaping, comfortable handling, and covers two large-wire profiles in one durable tool, making it good value for workshops that want a dependable manual crowning file without a large kit expense.

Frequently Asked Questions

Can this file be used on stainless-steel fretwire?
Yes; the file is made of tool-steel and StewMac notes their shop experience shows stainless wire does not cause premature wear.

Does the file cover multiple fret sizes?
Yes; it has two different 4' hollow-ground cutting edges designed for recrowning both wide and jumbo fretwire sizes.

Is this a complete fret crowning kit?
No; it is a single, economical crowning file and does not include guides, multiple radii, or powered tools that some full kits provide.