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.

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.

Does the job well.Bought it to flatten my other stones.

Japanese diamond stone 8" long (the Japanese make the best hand-forged kitchen knives (very expensive for a genuine one) and both diamond & ceramic "splash-and-go stones. 600 grit is medium fine. You should get stones from 140 course grit through 1000 or 1200 very fine. You can hone & polish with Shapton ceramic splash-and-go stones from 1000 to 8000 grit for true hand-forged mirror edges (not necessary with western knives. Finish sharpening with a leather stropping board to remove last remnants of the burr. Excellent quality, very long lasting & easy to use with good feedback to the knife hand-sharpener. Each Atoma stone is one-sided, so you can save money by buying a single-side stone like this 600 grit & buying a replacement diamond layer, say a 1200 grit (much cheaper), which is just the diamond sheet without the stone. Pull off the backing & attach to back of stone. Now you have a 2-sided stone for less than the price of 2 single-sided stones.Most people sharpen dry or with a little water mixed with dish soap. Best, though, is putting on 2 or 3 drops of Trent Lapping Fluid (avaliable from Amazon) & rubbing to cover surface of the diamond plate lightly with a Microfiber or other clean cloth. Best to sharpen to the blade's edge, not away.

I requested the Atoma Diamond Sharpener Coarse Grade ＃140 for my husband who restores straight razors. He intends to use the Atoma for flattening his JNATs and ceramic waterstones whenever needed. So far, he has worked on a SHOWA-era Shohonyama Tomae Kanmaki stone with the 140 Grit Atoma. The stone's history is that it was used as a polishing stone in a Japanese Barber shop. He says the Atoma makes great 'mud' exceptionally fast on the stone. I think hubby likes the Atoma.

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

I use this to flatten my stones. Does a good job, especially for the price. We will see how long it lasts but when it does stop working, I’ll probably buy this same one again!

This is the coarsest stone I have found. Cuts so fast. Great for chips and reprofiling. Large plate that is perfectly flat