StewMac Understring Fret Polisher

Understring Fret Polisher

Polish your frets faster and with more precision using the Understring Fret Polisher. This stainless steel tool provides pinpoint control over fret polishing, all without needing to remove the strings. The tool’s concave, fret-shaped groove holds adhesive-backed abrasives, making it easy to change grits and get the exact polish you need in seconds.

Any Grit You Need—Instantly

Unlike traditional crowning files, the Understring Fret Polisher lets you instantly change to the exact grit you need. Just cut your abrasive to size and attach it to the groove. Our favorite abrasive is Kovax Tolecut, known for its ultra-fine polishing and long-lasting durability—one sheet gives you around 72 uses!

The Fastest Way to Polish Frets

Raise your strings with String Jacks, then simply polish the frets without removing them. The special ultra-thin shape fits where traditional files can’t, giving you incredible control. Whether working with strings on or off, this tool speeds up your fretwork and ensures a perfect mirror shine.

Features:
- Durable stainless steel construction
- Instantly change grits for different levels of polishing
- Works with strings on or off for fast, efficient fretwork
- Fits all fret sizes

Save time and get professional results with the Understring Fret Polisher, the perfect follow-up tool for fret leveling and dressing.