---
product_id: 607432508
title: "MN850 Diamond Coated, Safe Zone Guitar Fret Crowning File (S-File)"
brand: "musicnomad"
price: "€ 230.69"
currency: EUR
in_stock: true
url: https://www.desertcart.hr/products/607432508-mn850-diamond-coated-safe-zone-guitar-fret-crowning-file-s
store_origin: HR
region: Croatia
---

# 240 grit premium diamond coating 0.38 lbs ergonomic weighted handle Patent-pending Safe Zone anti-overfiling MN850 Diamond Coated, Safe Zone Guitar Fret Crowning File (S-File)

**Brand:** musicnomad
**Price:** € 230.69
**Availability:** ✅ In Stock

## Summary

> 🎸 Crown your frets like a pro—no overfiling, just pure precision!

## Quick Answers

- **What is this?** MN850 Diamond Coated, Safe Zone Guitar Fret Crowning File (S-File) by musicnomad
- **How much does it cost?** € 230.69 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/607432508-mn850-diamond-coated-safe-zone-guitar-fret-crowning-file-s)

## Best For

- musicnomad enthusiasts

## Why This Product

- Trusted musicnomad brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Versatile & Durable:** Optimized for Nickel Silver frets on all guitars, banjos, and ukuleles—pro-level results in hours, not weeks.
- • **Dual-Channel Mastery:** Two perfectly radiused channels for narrow/medium and wide/jumbo frets, tailored for flawless fret crowning.
- • **Ergonomic Power Grip:** Heavy, offset silicone handle reduces hand fatigue and provides superior leverage for effortless filing.
- • **Cut Both Ways, Save Time:** Diamond coating cuts in both directions, speeding up your workflow unlike traditional one-way files.
- • **Precision Meets Protection:** Patent-pending Safe Zone design prevents overfiling—file with confidence every time.

## Overview

The MusicNomad MN850 Safe Zone S-File is a premium diamond-coated fret crowning tool engineered for precision and ease. Featuring a patent-pending Safe Zone to prevent overfiling, dual radiused channels for all fret sizes, and an ergonomic weighted silicone handle, it dramatically reduces the learning curve for fret crowning. Designed for Nickel Silver frets on a wide range of stringed instruments, this file cuts in both directions for faster, flawless results.

## Description

MusicNomad MN850 Diamond Coated, Safe Zone Guitar Fret Crowning File (S-File)

## Features

- A TRUE GAME-CHANGER: Designed by our Sonoma, CA team and in collaboration with top repair techs, the Safe Zone S-File sets a new higher standard for what you should expect when you buy a Fret Crowing File. No detail is overlooked, and it is packed with unmatched features and benefits.
- WHY DID I NOT THINK OF THE SAFE ZONE?: The patent pending Safe Zone innovation prevents you from over filing. At the top of the file, there is a small strip where there are no diamonds. Once you perfectly sculpt and round both sides of the frets, the S-File stops filing and skates on top of the fret. You can hear and feel the difference and it's time to move to the next fret. It's that simple...File-Skate-Go! The premium diamonds make both fast and precision filing. Whether you are a seasoned tech or new to fret crowing it reduces the learning curve from weeks to hours.
- THE PERFECT DIAMOND FILE DESIGN: The 240 grit premium diamond coating is perfectly rounded to closely match the original radius of your frets. One channel is for narrow/medium frets and the other is for wide/jumbo frets. After hearing many repair shops complain the wide side of existing files are too flat to use, we increased the roundness of our wide channel to improve the functionality. Additionally, our diamond file cuts in both directions, speeding up the process, unlike toothed files that cut in only one direction.
- BIG IMPROVEMENT OVER EXISTING HANDLE DESIGNS: Our comfortable, heavy, ergonomic handle design makes such a big difference. It starts with our innovative blue silicone comfort grip that reduces hand fatigue. The offset design provides both added leverage when filing and allows you to clear the guitar body when filing over it. Weight makes a difference. We beefed up our design so the weight of the S-File does the work for you and is in a weight class by itself at .38 lbs (173g). Lastly, the fret size channel application is engraved in the handle so it won't rub off, allowing you to know the correct file size to use. We even include a convenient hang hole.
- ADDITIONAL FEATURES & BENEFITS: It works amazing for crowning the most popular & widely used fret wire material, Nickel Silver, found on all Acoustic Guitars, Banjos, Ukuleles and most Electric & Bass Guitars. As with any file, using on Stainless Steel fret wire will shorten the file life. Stainless Steel is used on a small percentage of Electric and Bass Guitars. Our exclusive nose design features two lines for spot fret crowning. Position the line to be 90 degrees from the frets and you will just be filing right where the line intersects with the fret. Our high quality manufacturing process includes radiused & beveled edges along the entire perimeter.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product Dimensions | 22.23 x 3.48 x 0.43 cm; 181 g |
| Item model number | MN850 |
| Body Material | Silicone |
| Colour | Blue |
| Material Type | Diamonds, Silicone |
| Item Weight | 181 g |

## Images

![MN850 Diamond Coated, Safe Zone Guitar Fret Crowning File (S-File) - Image 1](https://m.media-amazon.com/images/I/61xkuFjWYKL.jpg)

## 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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**Shop now:** [https://www.desertcart.hr/products/607432508-mn850-diamond-coated-safe-zone-guitar-fret-crowning-file-s](https://www.desertcart.hr/products/607432508-mn850-diamond-coated-safe-zone-guitar-fret-crowning-file-s)

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-03-09*