8 x 3 Diamond Sharpening Stone – Dual-Sided Knife Sharpener – 300 & 1200 Grits

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!

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

Wonderful sharpening stone and fantastic customer service. Purchased this last year and I've sharpened many chisels and plane knives and it still works great and the price really can't be beat.These plates are deceivingly heavy like a few pounds and the large working surface is great for using honing guides. Not having any experience with diamond stones I decided to give these "Ultra Sharp" stones a try because they were cheaper than the competition but I'm extremely happy with the product and ultimately the service I received. They work so much better/faster than my old whetstones. When I purchased this item last year I had a minor defect in the surface of the coarse side where it was missing a small strip of diamond coating (like 1/16" wide by two inches diagonally) but it really didn't cause any problems. I ended up contacting the seller because I had some concerns/questions about tiny rust spots that were developing and what was the best way to prevent it. Upon seeing the minor imperfections in the pictures I had sent the seller offered to send me a replacement even though they didn't bother me, I was mostly interested in learning how to properly use/care for the stones. Seller was extremely helpful and I received a perfect stone a few days later and haven't had any issues since. If my stones ever stop working as well as they currently do, I would have no hesitation in purchasing this item again.

I puchased a set of Ultra Sharp diamond stones in the past, and I've used the heck out of them. Very happy with them overall. But I somehow put them away not fully dry at some point and they rusted, especially the 1200 grit stone. So I bought this combination 300/1200 stone and it's every bit as good as the original, but unlike the original ones, there's no printing on the side to indicate what the grits are. I'm going to pick this stone up in a few months and wonder what the heck the two grits are. Why should I have to go look it up? Annoying. However, from a functionality standpoint, great to have these two grits in one stone. I find both grits very useful for flattening waterstones, which I also use.

Have enjoyed sharpening things for many years and have only recently purchased this tool for some of the larger knives we have in our kitchen. Great instructions for "breaking in" the plate and for proper sharpening technique. Love the rubber feet and duel rod tightening function of this design. Very quick and simple to flip or swap plates, and it stays put as you do your sharpening. The results for this kit speak for themselves. Should have purchased one of these years ago! Very happy with the product and the results. If your on the fence due to price, don't hesitate, pull the trigger on this one. You will never be sorry that you added one of these, and if it is your first sharpener, I would dare to say that it will be the only one your will ever need.

I considered buying more expensive brands but decided to try this as it seemed to cover all my needs -- repair and sharpening. At first I was concerned with some brown gunk buildup on it but once I started spraying a lot of Windex while sharpening the gunk went away. I used the course side to reshape a broken knife tip and to repair chisels that were chipped. The fine side makes an excellent knife edge, not razor sharp but very sharp. I sharpened all my chisels and they worked perfectly on detail work -- shaving two pieces of crown molding to hide an offset joint. I also sharpened a plane, a Fiskars ax, a set of kitchen knives, and some other knives and it worked great on all of them. It was actually kinda fun. I may buy a leather strop and honing compound to get a razor-sharp edge and a mirror finish, but for now this has met my practical needs. Holding a chisel at the right angle is easy but holding a knife edge at just the right angle is tricky; you may want to buy or make a wedge to hold it at the exact angle. I used my finger to hold the edge flat but part of my finger tip was touching the stone. I didn't notice until I had worn away some skin and I was bleeding on the stone. Don't do that.

Very unhappy with this stone. About a month after buying it part of the fine grit side started to bubble and tore.

This is now my goto sharpener. I own several different "sharpeners" This is now my favorite. If I use it monthly, there is no reason to even use the 300 side. Just a few seconds with each knife on the 1200 side and its good to go. If I fall behind, or someone has used a knife on a glass cutting board then i use the 300 side first, then the 1200 side. A little water to keep it clean and cool, good to go!

very good value

First few minutes works good after that is smoother and doesn’t cut off the material from knife and discoloured, very disappointed not much different with cheap diamond plate.