---
product_id: 732997831
title: "MusicNomad MN850 Fret Round Work File"
brand: "music nomad ( ミュージックノマド )"
price: "$19937.14"
currency: USD
in_stock: false
reviews_count: 5
url: https://www.desertcart.us/products/732997831-musicnomad-mn850-fret-round-work-file
store_origin: US
region: United States of America
---

# Dual groove design fits narrow to jumbo frets Premium diamond coating for ultra-precise filing Ergonomic silicone grip reduces hand fatigue MusicNomad MN850 Fret Round Work File

**Brand:** music nomad ( ミュージックノマド )
**Price:** $19937.14
**Availability:** ❌ Out of Stock

## Summary

> 🎸 Crown your frets like a pro—comfort, precision, and speed in one tool!

## Quick Answers

- **What is this?** MusicNomad MN850 Fret Round Work File by music nomad ( ミュージックノマド )
- **How much does it cost?** $19937.14 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/732997831-musicnomad-mn850-fret-round-work-file)

## Best For

- music nomad ( ミュージックノマド ) enthusiasts

## Why This Product

- Trusted music nomad ( ミュージックノマド ) brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Universal Fit:** Two-sided U-shaped file adapts to almost all guitar and bass frets
- • **Ergonomic Comfort:** Silicone grip and perfect weight balance for fatigue-free use
- • **Pro-Grade Efficiency:** Speeds up fret crowning with consistent, scrape-free results
- • **Innovative Offset Design:** Keeps your hands safely away from the work area
- • **Precision Diamond Coating:** Cut in both directions for fast, flawless fret rounding

## Overview

The MusicNomad MN850 Fret Round Work File is a premium diamond-coated, U-shaped fret file designed for quick and precise fret crowning on guitars and basses. Featuring dual grooves for narrow to jumbo frets, an ergonomic silicone grip, and an innovative offset design, it ensures comfort, control, and scrape-free results. Trusted by professionals and hobbyists alike, it’s engineered to enhance your instrument maintenance with unmatched efficiency.

## Description

The MN850 -Safe Zone S-File-is a fret file that allows you to quickly and easily round frets. The file part is U-shaped to fit the radius of the fret; the apex has an undiamond-coated spot that glides over the fret; once the sides of the fret are rounded, it does not scrape any more. Premium diamond coating can be cut in both directions for fast, precise filing. When working with precision, the file line should be placed vertically to prevent it from shifting between the actual work area you want to work with. One side is for Narrow/Medium Frets and the other side is for wide/jumbo frets and works with almost all guitars and bass. Many repair shops have heard that the wide channel of the existing file is too flat and difficult to use, and we increased the roundness for wide/jumbo frets to improve functionality. Ergonomic handle design provides comfort and balance for the perfect weight for work, while the silicone comfort grip reduces hand fatigue. In addition, the innovative offset design is designed to keep your hands off when you work. Precautions for Use: Used on stainless fretwire will shorten file life. Please check the manufacturer's fret on the body.

Review: La mejor herramienta para coronar
Review: After 3 refrets with this crowning file, I can recommend it highly. The design of the tool virtually guarantees a very fine crown everytime. With two different sized grooves, it can cover most any size fret and does handle stainless steel frets very well. The one caveat I would add though is for first time users. Make sure you use the correct size for your fret job and always clean your file often to remove any debris that could hinder the workability of the file. Ergonomic and well weighted to allow you to let the tool do the work. Highly recommended

## Features

- The MN850 -Safe Zone S-File-is a fret file that allows you to quickly and easily round frets
- The file part is U-shaped to fit the radius of the fret; the apex has an undiamond-coated spot that glides over the fret; once the sides of the fret are rounded, it does not scrape any more
- Premium diamond coating can be cut in both directions for fast, precise filing
- One side for narrow/medium frets and the other side for wide/jumbo frets and works with almost all guitars and bass
- Ergonomic handle design provides comfort and balance to the perfect weight for work, while the silicone comfort grip reduces hand fatigue

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CS12ZY7C |
| Amazon Bestseller | #38,971 in Musical Instruments ( See Top 100 in Musical Instruments ) #1,289 in Guitar Cleaning & Care Products |
| Body Material | Silicone |
| Color Name | BLUE |
| Customer Reviews | 4.7 4.7 out of 5 stars (260) |
| Date First Available | January 26, 2024 |
| Item model number | MN850 |
| Material Type | ダイヤモンド、シリコン |

## Images

![MusicNomad MN850 Fret Round Work File - Image 1](https://m.media-amazon.com/images/I/61xkuFjWYKL.jpg)
![MusicNomad MN850 Fret Round Work File - Image 2](https://m.media-amazon.com/images/I/714eG4-emEL.jpg)
![MusicNomad MN850 Fret Round Work File - Image 3](https://m.media-amazon.com/images/I/71jeBGeRGjL.jpg)
![MusicNomad MN850 Fret Round Work File - Image 4](https://m.media-amazon.com/images/I/71l624RzPKL.jpg)
![MusicNomad MN850 Fret Round Work File - Image 5](https://m.media-amazon.com/images/I/71wePepjXeL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by E***Z on May 26, 2024*

La mejor herramienta para coronar

### ⭐⭐⭐⭐⭐ Review
*by P***B on October 31, 2025*

After 3 refrets with this crowning file, I can recommend it highly. The design of the tool virtually guarantees a very fine crown everytime. With two different sized grooves, it can cover most any size fret and does handle stainless steel frets very well. The one caveat I would add though is for first time users. Make sure you use the correct size for your fret job and always clean your file often to remove any debris that could hinder the workability of the file. Ergonomic and well weighted to allow you to let the tool do the work. Highly recommended

### ⭐⭐⭐⭐⭐ Review
*by M***N on October 15, 2025*

Super outil qui m'a permis de faire finaliser la planimétrie de ma guitare et donner une seconde jeunesse à ses frettes ! La lime est ergonimique et simple d'utilisation.

## Frequently Bought Together

- MusicNomad MN850 Diamond Coated, Safe Zone Guitar Fret Crowning File & Luthier Tool (S-File)
- MusicNomad Fret Leveler - Leveling (L-Beam) 17.6" (45cm) for Acoustic and Electric Guitars (MN811)
- MusicNomad Tracers Fret Erasers 6 pc. Finishing Kit for Sanding, Buffing and Polishing after Fret Crowning, Dressing or Beveling (MN860)

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-02-16*