---
product_id: 57800197
title: "Atoma Diamond Sharpener Medium - #400"
brand: "atoma"
price: "A$219"
currency: AUD
in_stock: true
reviews_count: 13
category: "Atoma"
url: https://www.desertcart.com.au/products/57800197-atoma-diamond-sharpener-medium-400
store_origin: AU
region: Australia
---

# Premium diamond grit #400 Compact 8" x 2.77" size Lightweight 600g precision Atoma Diamond Sharpener Medium - #400

**Brand:** atoma
**Price:** A$219
**Availability:** ✅ In Stock

## Summary

> 💎 Sharpen like a pro, stay ahead of the curve!

## Quick Answers

- **What is this?** Atoma Diamond Sharpener Medium - #400 by atoma
- **How much does it cost?** A$219 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/57800197-atoma-diamond-sharpener-medium-400)

## Best For

- atoma enthusiasts

## Why This Product

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

## Key Features

- • **Diamond Toughness:** Medium rough #400 grit for aggressive, precise sharpening
- • **Perfectly Portable:** Compact 8" x 2.77" size fits effortlessly in any workshop setup
- • **Unrivaled Sharpness:** Transforms chisels and planes to razor-edge perfection every time
- • **Engineered for Precision:** 600g weight balances stability with easy handling
- • **Investment in Excellence:** Trusted by pros for flawless tool maintenance—because your craft deserves the best

## Overview

The Atoma Diamond Sharpener Medium (#400 grit) is a premium diamond sharpening plate measuring 8" x 2.77" x 0.32" and weighing 600g. Designed for medium rough sharpening, it delivers aggressive yet precise edge refinement, ideal for chisels and planes. Praised by professionals for its durability and performance, this sharpener ensures your tools maintain razor-sharp edges, making it a must-have for serious craftsmen.

## Description

Grit: Medium Rough #400;Type: Diamond;Size: 8" x 2.77" x .32" H

Review: Rough diamond - This I think is a great sharpening plate, I used to remove the initial covering on a chisels flat side and to get the plate primed for use - I really like it, expensive but worth it
Review: Your paying for the best of the best - Top banana of sharpening stones. Pricey but worth it!! Never had chisels and planes so sharp. Well worth buying an Atoma flattening diamond blade to keep your waterstones perfectly flat. I use 1000, 5000 & 12000 grit Shapton Waterstones with this Atoma 400 grit diamond blade. Expensive method but you get perfect super sharp stubborn end grain cutting edges to your tools.

## Features

- Grit: Medium Rough #400
- Type: Diamond
- Size: 8" x 2.77" x .32"

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0031KNR2O |
| Brand | Atoma |
| Colour | Grey |
| Customer Reviews | 4.8 4.8 out of 5 stars (624) |
| Date First Available | 14 May 2013 |
| Item Weight | 600 g |
| Material | Diamond |
| Model Number | 78DIASHARP |
| Product Dimensions | 20.32 x 7.04 x 0.81 cm; 600 g |

## Product Details

- **Brand:** Atoma
- **Colour:** Grey
- **Global Trade Identification Number:** 04954452126671
- **Grit type:** Coarse
- **Item weight:** 0.6 Kilograms
- **Manufacturer:** Atoma
- **Material:** Diamond
- **Number of items:** 1
- **Product dimensions:** 20.3L x 7W x 0.8H centimetres
- **UPC:** 798527543871 789246562458

## Images

![Atoma Diamond Sharpener Medium - #400 - Image 1](https://m.media-amazon.com/images/I/315qxteVO5L.jpg)
![Atoma Diamond Sharpener Medium - #400 - Image 2](https://m.media-amazon.com/images/I/61qBLDNtxbL.jpg)

## Questions & Answers

**Q: hello. Are the two bases of the plane completely flat? Can I stick the replacement sticker on the back as well?**
A: Yep - top side comes with it attached obviously but the bottom is just flat aluminum you could attach a replacement onto provided making the whole thing a little thicker isn't gonna be an issue for your use.

**Q: is this the actual base / stone too or just the abrasive sheet**
A: It looks like the base and the plate  as the seller should have clarified this in his advertising best thing is contact him to be sure

**Q: Are there any additional costs to be paid on this atoma diamond sharpener for customs, duties & taxes into the uk ?**
A: Not that I am aware of .

## Customer Reviews

### ⭐⭐⭐⭐⭐ Rough diamond
*by S***N on 5 July 2024*

This I think is a great sharpening plate, I used to remove the initial covering on a chisels flat side and to get the plate primed for use - I really like it, expensive but worth it

### ⭐⭐⭐⭐⭐ Your paying for the best of the best
*by A***. on 25 April 2017*

Top banana of sharpening stones. Pricey but worth it!! Never had chisels and planes so sharp. Well worth buying an Atoma flattening diamond blade to keep your waterstones perfectly flat. I use 1000, 5000 & 12000 grit Shapton Waterstones with this Atoma 400 grit diamond blade. Expensive method but you get perfect super sharp stubborn end grain cutting edges to your tools.

### ⭐⭐⭐⭐⭐ Extremely high quality stone plate
*by O***I on 18 September 2025*

Excellent quality

## Frequently Bought Together

- Atoma Diamond Sharpener Medium - #400
- Atoma Diamond Plate Knife Sharpening Flattening Whetstone #1200
- Atoma Diamond Sharpener Fine - #600

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**Shop now:** [https://www.desertcart.com.au/products/57800197-atoma-diamond-sharpener-medium-400](https://www.desertcart.com.au/products/57800197-atoma-diamond-sharpener-medium-400)

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-02*