StewMac Fret Erasers Complete 7-Grit Set - Precise Fret Polishing

In this review the StewMac Fret Erasers Complete 7-Grit Set is recommended for guitar and bass techs, home luthiers, and players who want fast, consistent fret polishing without dust or loose abrasive. The bottom line: this set delivers a clear path from rough file marks to a mirror finish because the seven color-coded grits cover every step of smoothing and polishing, and the flexible, self-padded blocks conform to fret crowns for precise contact and control.

Key Features

• Complete 7-grit progression: The included 220, 400, 800, 1200, 2000, 4000 and 8000 grits provide a full polishing workflow so users can remove file marks and refine to a shine without adding extra abrasive products.
• Flexible abrasive blocks: The self-padded rubber blocks conform to fret shapes for even contact, making it easier to get consistent results along the whole neck.
• Color-coded for convenience: Each block is clearly marked and color-coded so you can move through grits quickly and avoid confusion during a multi-step polish.
• Mess-free polishing: Because these are bonded abrasive blocks there is no loose grit or steel wool residue, which keeps frets and surrounding wood cleaner and speeds up the finishing process.
• Ergonomic size: At roughly 2-1/2 in x 3/4 in x 3/8 in each block fits the hand for controlled passes and access along the fretboard edges.

Who It's For

The set is aimed at instrument repair techs, luthiers, and serious DIYers who routinely level and polish frets and need a reliable, repeatable system to go from rough to mirror finish. It is particularly useful for those who prefer a tidy, dust-minimized process and want a compact kit that covers a full grit progression.

Players who only need a one-off polish or occasional light touch-ups might find the full seven-piece progression more than required, and those who need power-tool polishing should look for compatible abrasive wheels rather than hand blocks.

Pros & Cons

Pros

• Clear grit progression lets users achieve mirror-finish results without mixing abrasives.
• Flexible, self-padded blocks conform to fret crowns for even polishing and better control.
• Color-coding and markings speed workflow and reduce mistakes when changing grits.
• Durable construction and no loose grit makes the process cleaner and longer lasting.

Cons

• Hand-block polishing requires time and patience compared with power-tool methods for large jobs.
• Some users doing only occasional small touch-ups may not need all seven grits in the set.

Specifications

Included grits	220, 400, 800, 1200, 2000, 4000, 8000
Block size	2-1/2 in x 3/4 in x 3/8 in
Material	Flexible self-padded abrasive rubber
Finish capability	Removes file marks to mirror finish
Identification	Color-coded and clearly marked grits
Mess control	No loose grit, sandpaper, or steel wool residue
Support	Lifetime Promise and expert tech support

Our Verdict

The StewMac Fret Erasers Complete 7-Grit Set is a practical, well-thought-out kit for anyone who polishes frets by hand; it covers every step from coarse smoothing to a mirror finish while staying clean and controlled. For techs and careful DIYers it represents good value because the durable, color-coded blocks simplify workflow and should last through many jobs.

Frequently Asked Questions

Will these blocks fit fretboard edges and tight spaces?
Yes, the flexible, self-padded design conforms to fret crowns and the compact 2-1/2 in size provides access along most neck profiles.

Do they leave abrasive residue on the frets or fretboard?
No, the bonded abrasive blocks are designed to avoid loose grit and the process is cleaner than sandpaper or steel wool.

Is the set suitable for professional use?
Yes, the seven-grit progression, durability, and color-coding make the kit well suited to professional techs and serious home luthiers.