Atoma Diamond Sharpener Coarse Grade　＃140

This a great quality stone, made in Japan..it cuts very fast , and is suitable for all size knives. I have even used it as a lapping stone for softer aluminum oxide stones and it still cuts steel wonderfully..this is what you use to established a bevel or repair a badly damaged bevel. This is not an everyday or every week maintaining Stone. It is very aggressive. The base is made from aluminum and is very flat. You can use a heat gun to heat it up and replace the abrasive on top once it's worn out and you can also attach another grit to the back side if you would like to have a dual sided stone, which they sell the individual cards instead of the whole Stone as well.

The best part is that as far as I can tell, the surface is extremely flat which was very important to me. This makes very quick work of flattening water stones. It's a little slower than I expected for flattening the backs of chisels, but I also haven't found anything faster, so maybe it's as good as one can realistically hope for? I also really appreciate the size of it. I have some smaller DMT plates, and while excellent, they were much harder to use for most tasks due to the smaller size. I have a number of water, oil and diamond stones and this has become one of the most important ones in my collection. Update: So I've had this plate for quite a while and it's still working well, if slower than expected. I still like it a lot and still think it's probably the best value in its class, but I'm surprised at how slowly it cuts. I'm really on the edge as to whether I think it should be 4 or 5 stars because of that. Everything else about it is excellent, but when you're buying a 140 grit stone you expect it to hog off material like crazy. I guess I would call it 4.5 stars if I could. Buy it, but if you're planning on flattening chisel or plane iron backs with it don't expect miracles; it's still going to be a workout. The main reason I edited this review at all was to add a picture I just took with a cheap usb microscope. Keep in mind this is after a year or so of use. More interesting than anything else.

Great for flattening.

Incredible stone. Flat, fast cutting. This is my 2nd Atoma (first one was the 400). Highly recommend Atoma and if you need an aggressive stone that will remove a lot of steel quickly but don't want to use a grinding wheel, this is a great stone for re grinding bevels in chisels and planes.

I use this for all of my Shapton stones 3000k and below. I use the 600 grit atoma plate to flatten anything above 5k. They are awesome and last a long time and when they aren't working well anymore just pull of the replaceable Diamond sheet and stick on a new one. I have a 600 grit on one side of the plate and the 140 on the other side its a great 1/2 punch. They also work great for fixing chips and broken tips in a hurry.

I just got this sharpener earlier this week. It gets the job done. In my quest to learn how to sharpen my knives I practiced on an old knife I picked up at a thrift store and an inexpensive carbon knife that I wanted to learn on. I own a few water stones, 400, 800, 1000, 3000 grit. I could not get a really sharp edge with even the most coarse stone. The Atoma gets down to the basics. It will put the starting edge on any knife, quickly. Will I have to use it very often, probably not, but it will be there to flatten my water stones until I need it to fix a very dull knife. It's an expensive but a useful tool that I appreciate having in my collection. btw, I recommend a stropping leather as well to finish things off.

Bought this as a truing stone for my actual whetstone. Does a great job flattening and rounding off the edges and is easy to rinse off when you're done. I haven't tried actually sharpening anything with this yet, so I can't speak to it's capability there

Best diamond stone I've used. Well worth the money.