---
product_id: 30802592
title: "8 x 3 Diamond Sharpening Stone – Dual-Sided Knife Sharpener – 300 & 1200 Grits"
brand: "ultrasharp"
price: "NZ$212"
currency: NZD
in_stock: true
reviews_count: 10
category: "Ultrasharp"
url: https://www.desertcart.nz/products/30802592-8-x-3-diamond-sharpening-stone-dual-sided-knife-sharpener
store_origin: NZ
region: New Zealand
---

# 300 & 1200 grit 8" x 3" size Lifetime guarantee 8 x 3 Diamond Sharpening Stone – Dual-Sided Knife Sharpener – 300 & 1200 Grits

**Brand:** ultrasharp
**Price:** NZ$212
**Availability:** ✅ In Stock

## Summary

> 🔧 Sharpen Your Edge, Elevate Your Game!

## Quick Answers

- **What is this?** 8 x 3 Diamond Sharpening Stone – Dual-Sided Knife Sharpener – 300 & 1200 Grits by ultrasharp
- **How much does it cost?** NZ$212 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/30802592-8-x-3-diamond-sharpening-stone-dual-sided-knife-sharpener)

## Best For

- ultrasharp enthusiasts

## Why This Product

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

## Key Features

- • **Safety First:** Includes a non-skid universal stone holder.
- • **Lifetime Assurance:** No questions asked, 100% lifetime guarantee.
- • **Precision Perfected:** Guaranteed flatness for optimal sharpening.
- • **Value You Can Trust:** The best value in diamond sharpening stones.
- • **Unmatched Versatility:** Sharpens all steel types with ease.

## Overview

The Ultra Sharp Diamond Sharpening Stone is a premium 8" x 3" tool featuring both coarse (300 grit) and extra fine (1200 grit) surfaces, designed to sharpen all types of steel with guaranteed precision flatness. It comes with a non-skid universal stone holder for safety and is backed by a lifetime guarantee, ensuring you can sharpen with confidence.

## Description

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Review: Excellent for lapping natural stones, tools and repair work on damaged knives - I’m a cutlery collector and sharpening nerd and I own all manner of Shapton splash and ceramic stones, old school Japanese full soak water stones, Arkansas black and translucent oil stones and high end and pricey JNAT (Japanese natural) stones for my cutlery and tools. I’ve been sharpening for 50+ years and I really like the Ultra Sharp stone family, but while the Atoma line is more expensive, it is the best of the pack. Why so many stones? It’s all dependent on what you want to sharpen - Japanese, German, stainless, regular steel etc. all require a different sharpening approach for ideal results. The Ultra Sharp all metal diamond coated stones excel at lapping (smoothing out the surface) of Japanese natural stones when they are new and can also be used to clean up natural stones and remove “dishing” from extended knife sharpening with JNATS. The Ultra Sharp are also excellent for chisels and planer blades that can easily gouge a even a hard natural stone. The great part about the Ultra Sharp stones is they are bullet proof, great for beginners as well as experienced knife sharpeners and cannot be easily damaged unless you do something really stupid. I have an Ultra Sharp 300/1200 combo stone and 3000 grit Ultra Sharp stone that I use weekly. That trio of stones will effectively service every tool blade and most common cutlery without additional stones for most users who sharpen a couple of knives a week or even a month. My one "con" with the Ultra 300/1200 combo stone is that when the stone is wet, it can be hard to tell one side from another (it's NOT marked) especially after a lot of use when the 300 wears down a bit. I stamped a "3" on the side of the metal stone so I could know with a quick glance which side was which. See my photos of the Ultra on the left in the stainless/rubber stone holder and the DMT on the right in the cheesy DMT plastic stone holder. The "edge shot" shows the steel Ultra Sharp steel core versus DMT plastic core. The DMT's work OK but I have them relegated to my wood shop for chisels, planes, common shop knives and my ubiquitous Swiss Army knife. Cutting wise, I prefer the Ultra Sharp over DMT because the Ultra has a solid diamond coating and the DMT uses a diamond lattice embedded in a plastic base. It’s just a smoother cut with the Ultra over the DMT but the Atoma stones mentioned earlier are the best of all three but cost a bit more. I know there is a lot of data here and I also hope that it helps!
Review: It really works as I had hoped - I'm very happy with this stone as it really does perform well, in fact better than I hopedddddddddd. A lot of product promise so much and I have questioned for some time 'do I really need this'..well, it looks like it was the missing piece in my sharpening arsenal. Where I noticed it most is with my modern hard steels on the chef knives, these made the job of returning the edge so much easier, faster and sharper that I could not stop sharpener every knife I had, and then it was onto my chizels...the ultra flat surface was amazing and it doesn't wear grooves like a traditional stone. Also being wider and longer than my other stones again made it easier as I wasn't need to sharpen longer blade. The combo was a great first stone to see/judge there Grit ratings and I think they are perfect. Good value, good product

## Features

- DUAL GRIT FOR COMPLETE SHARPENING: Whether you need to repair a chipped edge or achieve a razor-sharp finish, this two-sided stone has you covered. Use the 300-grit side for aggressive metal removal and the 1200-grit extra-fine side for honing and polishing
- FAST & EFFICIENT RESULTS: Engineered with monocrystalline diamonds, these plates sharpen significantly faster than traditional whetstones saving you time. No messy oils or soaking required ; Instruction Included
- ULTRA-FINE PRECISION SHARPENING: Achieve a mirror-like polish and a razor-sharp edge on your knives and tools. The 8" x 3" surface provides ample space for large kitchen knives, woodworking chisels, and plane blades. Stone Holder included
- DURABLE & STAY-FLAT DESIGN: Unlike waterstones that dish out and require flattening, these diamond plates remain flat over time, providing a lifetime of precision sharpening; Durable design sharpens even the hardest steels with ease
- RISK-FREE 100% GUARANTEE: We stand by our sharpeners. If this diamond sharpening stone ever fails to perform, we will replace it or refund you—no questions asked. Purchase with total confidence

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B01FPI7J6O |
| Best Sellers Rank | #271,929 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #509 in Sharpening Stones |
| Brand | Ultrasharp |
| Brand Name | Ultrasharp |
| Color | Silver |
| Customer Reviews | 4.5 out of 5 stars 198 Reviews |
| Grit Type | Extra Fine,Coarse |
| Item Dimensions L x W x H | 8"L x 3"W x 0.25"H |
| Item Weight | 3.4 Pounds |
| Manufacturer | Ultra Sharp |
| Manufacturer Part Number | DC38 |
| Material | Diamonds, Steel |
| Material Type | Diamonds, Steel |
| Model Number | DC38 |
| Number of Items | 1 |
| Product Dimensions | 8"L x 3"W x 0.25"H |
| UPC | 617401201792 |

## Product Details

- **Material:** Stainless Steel, Stone
- **Brand:** Ultrasharp
- **Color:** Silver
- **Product Dimensions:** 8"L x 3"W x 0.25"H
- **Item Weight:** 3.4 Pounds
- **Grit Type:** Extra Fine,Coarse
- **Number of Items:** 1
- **Manufacturer:** Ultra Sharp
- **UPC:** 617401201792

## Images

![8 x 3 Diamond Sharpening Stone – Dual-Sided Knife Sharpener – 300 & 1200 Grits - Image 1](https://m.media-amazon.com/images/I/61Lu4AC0PcS.jpg)
![8 x 3 Diamond Sharpening Stone – Dual-Sided Knife Sharpener – 300 & 1200 Grits - Image 2](https://m.media-amazon.com/images/I/81yAVHRLvWL.jpg)
![8 x 3 Diamond Sharpening Stone – Dual-Sided Knife Sharpener – 300 & 1200 Grits - Image 3](https://m.media-amazon.com/images/I/71Wt8JXdK2L.jpg)
![8 x 3 Diamond Sharpening Stone – Dual-Sided Knife Sharpener – 300 & 1200 Grits - Image 4](https://m.media-amazon.com/images/I/71Z6ZCtmAtL.jpg)
![8 x 3 Diamond Sharpening Stone – Dual-Sided Knife Sharpener – 300 & 1200 Grits - Image 5](https://m.media-amazon.com/images/I/71tz8qqCXqL.jpg)

## Questions & Answers

**Q: Are the diamonds embedded by electro plating or adhiesive ?**
A: The diamonds are electroplated onto the metal plates.

**Q: Does the stone holder in the picture come with the stone. If so can it be used with other ultra sharp diamond shaped stones**
A: Yes,  the stone holder in the picture does come with the stone and yes it can be used with all other Ultra Sharp Diamond stones.  In fact, the stone holder is adjustable and can be used with any stone that is between 6" and 9" long.

**Q: What is the flatness tolerance of these stones?**
A: +/- .001 (1/1000th) over the entire length/width of the stone.

**Q: What is the diamonds per square inch?**
A: The number of particles per square inch depends on the grit of the stone.   In practical terms, grit is the number of abrasive particles that can pass through a screen with specific sized openings.  A 100 grit abrasive particle will pass through a mesh screen that has 100 openings per inch.  (This definition is generally accepted but the values are approximate.  The thickness of the wire used to make a specific screen will vary the number of openings per square inch of that specific screen.)In general, a higher grit number represents a smaller particle size that will produce a finer edge.  A lower grit number indicates a larger coarser particle size that will remove material much faster.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent for lapping natural stones, tools and repair work on damaged knives
*by R***T on March 14, 2022*

I’m a cutlery collector and sharpening nerd and I own all manner of Shapton splash and ceramic stones, old school Japanese full soak water stones, Arkansas black and translucent oil stones and high end and pricey JNAT (Japanese natural) stones for my cutlery and tools. I’ve been sharpening for 50+ years and I really like the Ultra Sharp stone family, but while the Atoma line is more expensive, it is the best of the pack. Why so many stones? It’s all dependent on what you want to sharpen - Japanese, German, stainless, regular steel etc. all require a different sharpening approach for ideal results. The Ultra Sharp all metal diamond coated stones excel at lapping (smoothing out the surface) of Japanese natural stones when they are new and can also be used to clean up natural stones and remove “dishing” from extended knife sharpening with JNATS. The Ultra Sharp are also excellent for chisels and planer blades that can easily gouge a even a hard natural stone. The great part about the Ultra Sharp stones is they are bullet proof, great for beginners as well as experienced knife sharpeners and cannot be easily damaged unless you do something really stupid. I have an Ultra Sharp 300/1200 combo stone and 3000 grit Ultra Sharp stone that I use weekly. That trio of stones will effectively service every tool blade and most common cutlery without additional stones for most users who sharpen a couple of knives a week or even a month. My one "con" with the Ultra 300/1200 combo stone is that when the stone is wet, it can be hard to tell one side from another (it's NOT marked) especially after a lot of use when the 300 wears down a bit. I stamped a "3" on the side of the metal stone so I could know with a quick glance which side was which. See my photos of the Ultra on the left in the stainless/rubber stone holder and the DMT on the right in the cheesy DMT plastic stone holder. The "edge shot" shows the steel Ultra Sharp steel core versus DMT plastic core. The DMT's work OK but I have them relegated to my wood shop for chisels, planes, common shop knives and my ubiquitous Swiss Army knife. Cutting wise, I prefer the Ultra Sharp over DMT because the Ultra has a solid diamond coating and the DMT uses a diamond lattice embedded in a plastic base. It’s just a smoother cut with the Ultra over the DMT but the Atoma stones mentioned earlier are the best of all three but cost a bit more. I know there is a lot of data here and I also hope that it helps!

### ⭐⭐⭐⭐⭐ It really works as I had hoped
*by V***Y on March 18, 2023*

I'm very happy with this stone as it really does perform well, in fact better than I hopedddddddddd. A lot of product promise so much and I have questioned for some time 'do I really need this'..well, it looks like it was the missing piece in my sharpening arsenal. Where I noticed it most is with my modern hard steels on the chef knives, these made the job of returning the edge so much easier, faster and sharper that I could not stop sharpener every knife I had, and then it was onto my chizels...the ultra flat surface was amazing and it doesn't wear grooves like a traditional stone. Also being wider and longer than my other stones again made it easier as I wasn't need to sharpen longer blade. The combo was a great first stone to see/judge there Grit ratings and I think they are perfect. Good value, good product

### ⭐⭐⭐⭐⭐ Best sharpening stone I’ve used so far
*by A***. on September 6, 2023*

This stone and holder are top notch products, as soon as I received this set I knew I made the right choice. Right away, the weight of this stone is much more than any stone I’ve ever owned, the holder is heavy as well and keeps the stone in place easily on any flat surface. The stone itself is a joy to use and cuts very quickly and is a breeze to keep clean. Just make sure you take an old whetstone and some water and break in your new diamond stone by using it to flatten your old whetstone. There’s instructions on a few other ways to break the stone in that comes with it. They recommended diluted krud kutter as lube and so far that’s been working wonderfully. I love this stone and now all my knives are sharper than ever sad all I use is both sides of this stone and maybe a strop if I want to. Buy it you’ll love it

## Frequently Bought Together

- Ultra Sharp Diamond Sharpening Stone (2-sided) 8 x 3 - Coarse and Extra Fine Grits
- Trend Diamond Abrasive Lapping Fluid, 3.4 fl oz, Blue, Professional Grade Sharpening Fluid for Optimum Performance, DWS/LF/100
- Ultra Sharp Diamond Sharpening Stone - 3000 Grit - 8 x 3

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-06-09*