--- product_id: 181543413 title: "UltraSharp 8 x 3 Diamond Sharpening Stone – Dual-Sided Knife Sharpener – 300 & 1200 Grits" brand: "ultrasharp" price: "NZ$599" currency: NZD in_stock: true reviews_count: 5 category: "Ultrasharp" url: https://www.desertcart.nz/products/181543413-ultrasharp-8-x-3-diamond-sharpening-stone-dual-sided-knife store_origin: NZ region: New Zealand --- # Fast, durable diamond surface Dual grit precision sharpening Non-slip universal holder UltraSharp 8 x 3 Diamond Sharpening Stone – Dual-Sided Knife Sharpener – 300 & 1200 Grits **Brand:** ultrasharp **Price:** NZ$599 **Availability:** ✅ In Stock ## Summary > 🔪 Sharpen like a pro, stay ahead of the curve! ## Quick Answers - **What is this?** UltraSharp 8 x 3 Diamond Sharpening Stone – Dual-Sided Knife Sharpener – 300 & 1200 Grits by ultrasharp - **How much does it cost?** NZ$599 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/181543413-ultrasharp-8-x-3-diamond-sharpening-stone-dual-sided-knife) ## 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 - • **Generous 8x3 Inch Size:** Ample surface area for versatile sharpening of knives, tools, and natural stones - • **Dual-Sided Grit Mastery:** Coarse 300 grit for rapid edge restoration, extra fine 1200 grit for razor-sharp polish - • **Premium Diamond Surface:** Ultra-durable diamond coating delivers fast, consistent sharpening results that last - • **Secure Sharpening Stability:** Non-skid universal stone holder ensures safe, slip-free sharpening every time - • **Trusted by Pros & Enthusiasts:** 4.3-star rating from 190+ users who demand precision and reliability ## Overview The Ultra Sharp Diamond Sharpening Stone is a professional-grade, dual-sided sharpening tool featuring coarse 300 grit and extra fine 1200 grit diamond surfaces. Measuring 8 x 3 inches, it includes a non-slip universal holder for safe, stable use. Designed for rapid edge restoration and fine polishing, this durable stone is highly rated by users for maintaining knives, tools, and natural stones with precision and ease. ## Description International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. Review: good diamond stone - very good value 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! ## Features - 8" x 3" Diamond Combination Sharpening Stone 300 and 1200 Grit - The Best Value We've Seen in a diamond sharpening stone - Non skid universal stone holder included - International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions..International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01FPI7J6O | | Brand | ULTRASHARP | | Brand Name | ULTRASHARP | | Colour | Black, Silver | | Customer Reviews | 4.5 out of 5 stars 191 Reviews | | Grit Type | Coarse,Extra Fine | | Grit type | Coarse , Extra Fine | | Item Dimensions L x W x H | 20.3L x 7.6W x 0.6H centimetres | | Item Weight | 3.4 Pounds | | Item weight | 3.4 Pounds | | Manufacturer | Ultra Sharp | | Manufacturer Part Number | DC38 | | Material | Stone | | Material Type | Stone | | Model Number | DC38 | | Number of Items | 2 | | Product dimensions | 20.3L x 7.6W x 0.6H centimetres | | UPC | 617401201792 | ## Product Details - **Material:** Stone - **Brand:** ULTRASHARP - **Colour:** Silver, Black - **Item weight:** 3.4 Pounds - **Grit type:** Coarse,Extra Fine - **Number of items:** 2 - **Manufacturer:** Ultra Sharp - **UPC:** 617401201792 ## Images ![UltraSharp 8 x 3 Diamond Sharpening Stone – Dual-Sided Knife Sharpener – 300 & 1200 Grits - Image 1](https://m.media-amazon.com/images/I/61Lu4AC0PcS.jpg) ![UltraSharp 8 x 3 Diamond Sharpening Stone – Dual-Sided Knife Sharpener – 300 & 1200 Grits - Image 2](https://m.media-amazon.com/images/I/81yAVHRLvWL.jpg) ![UltraSharp 8 x 3 Diamond Sharpening Stone – Dual-Sided Knife Sharpener – 300 & 1200 Grits - Image 3](https://m.media-amazon.com/images/I/71Wt8JXdK2L.jpg) ![UltraSharp 8 x 3 Diamond Sharpening Stone – Dual-Sided Knife Sharpener – 300 & 1200 Grits - Image 4](https://m.media-amazon.com/images/I/71Z6ZCtmAtL.jpg) ![UltraSharp 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 ### ⭐⭐⭐⭐⭐ good diamond stone *by R***E on 15 February 2022* very good value ### ⭐⭐⭐⭐⭐ Excellent for lapping natural stones, tools and repair work on damaged knives *by R***T on 14 March 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 18 March 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 ## 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 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.nz/products/181543413-ultrasharp-8-x-3-diamond-sharpening-stone-dual-sided-knife](https://www.desertcart.nz/products/181543413-ultrasharp-8-x-3-diamond-sharpening-stone-dual-sided-knife) --- *Product available on Desertcart New Zealand* *Store origin: NZ* *Last updated: 2026-06-01*