SK11(エスケー11)SK11 Double Sided Diamond Whetstone #400#1000 8.0 x 2.6 x 0.3 inches (204 x 65 x 7 mm)

It's not perfectly flat and mine had a couple of high spots around the corner, possibly they didn't clean up the steel after it was cut. The high spots were knocked down easily enough by rubbing edges of the plate with another sharpening stone. It's flat enough that it would probably be fine for sharpening most knives, and flattening waterstones too so long as you don't absolutely need them to be perfectly flat. The diamonds seem to be well adhered, they don't immediately start flaking off like cheap diamond tools. And the interrupted pattern seems to make the diamonds last longer for reasons I don't understand, although I'm not sure about that. I'm using it for something that wears out plates very quickly and it's at least approximately as durable as a DMT plate. Also I like that it came with a rubber mat to sit it on, very thoughtful.Would make a great coarse stone for knives, so long as you're not a perfectionist.

PROS:-Good mass. The plate is heavy steel, thicker than I expected.-Good size, a little larger than other 2"x6" plates... should make it a lot easier to sharpen wider chisels and plane steels.-It has a bright finish on it.. all sides including under the face of the grit... likely whatever they embed the diamond into is coating all sides. So far, it appears to do an excellent job of resisting rust. I used it wet with no issues. This has been a problem with another more expensive fine plate I have.-The diamond grit seems to be of fairly uniform size though it's harder to tell with coarse grit. Certainly uniform enough for a #150 and #600 plate. No 'snot globs' of diamond like I've seen on really cheap diamond sharpeners.- I like grit-free cross-hatch pattern on the faces, which allows for debris to collect away from the diamond-coated surfaces.- It's a small thing, but the included rubber strip (to place the plate on) helps keep the plate in place and protects whatever you're placing it on. In my case, I've already used this to re-face a couple chisels on my Corian kitchen counter-top and the combined mass of the 'stone' and the rubber strip helped keep the 'stone' from moving as I used it.All in all...It did exactly what I needed it to do, quickly cut through tool steel to remove chips and other defects from my chisels that an Arkansas stone or my finer-grit stones would have have taken me more than 10x more work to accomplish.The size is excellent, especially at this price. I look forward to putting a clean bevel edge on some planer steels next.CONS:NONE (so far). I've just received it and, so far, only run a couple chisels across it but it seems to be well made. No indication that it's shedding grit yet. No indication that it will rust when used wet.If there's anything I could possibly qualify as a con with this... I like to support US tool-makers, but I had a need for this and at least one additional diamond sharpener and, right now, my budget doesn't support buying DMT's (or similar's) very nice but very expensive large plate diamond sharpeners.I'm VERY happy so far. I plan to order a finer grit plate from them based on my experience with this one. Uniformity of grit size and flatness/quality of the plate is more important there so I wanted to see if they could get the #150/#600 right first. So far, so good. From what I'm seeing, even if a finer-grit version isn't perfect, I expect it will be more than adequate for me to a point where I can quickly finish up with my Japanese wet stones.

Very good as quality. Mine wasn't "perfectly" flat, had a very, very small rise on one edge. I'll just stay away from it for perfect edges. Good enough for flattening coarse whetstones.After breaking in the surfaces it's a great sharpener! And the price was fantastic.Edit - whacked the one slightly high edge with a brass hammer a couple times, now it's almost perfect!

I bought this in 2018 and now in 2022 I am telling you it's as good as my DMT and much cheaper. They are more gritty when new but they still work after the excess grit is removed. I have over 100 knifes and I also sharpen my 2 sons knives. This is step one after camping or a day of heavy cutting. 400 then 1000 and leather strop. Sharp enough for me! If i want it sharper I have Japanese wet stones also bought here for $30.

I bought this stone after seeing virtuovice use it, and after reading the other positive reviews here and around the web. I have an Atoma 400 which I also love to death - definitely more than this stone - but the Atoma was twice as much for a single grit. Worth it, but I couldn't afford 2 more Atoma stones.As soon as I got this, I sharpened a Bowie knife I had been holding off on as I knew it needed a fair bit of material removed. The 150 side tore through it in about 20-25 minutes, I had a new edge formed, AND I had fixed the tip of the knife to be pointy again. Really effortlessly. Just light edge leading strokes is my method.Then I flipped it over to the 600 side. Damn. Amazing. The feel of the 600 side is great. The feedback feels wonderful. You can really feel it 'sanding' the edge.This would also make a great travel stone. 150 and 600 will put an edge on literally anything. A great addition to mine and anyones collection who is needing something really coarse, and doesn't want to unnecessarily grind away at their finer stones.Lastly, the stone will turn slightly brownish after it dries - according to SK11 this is completely normal and nothing to worry about. I find just with my Atoma that a Pink Pearl Eraser is the quickest, cheapest, cleanest, easiest way to clean any diamond stones.It comes with a little not-quite-rubber (it's smoother) pad to set the stone on as well.

Lo compré de importación, vino por Japan Post, se demoró casi un mes pero llegó sin problemas y en buen estado. El precio de alrededor de 700 M.N. incluyendo envío es razonable para este tipo de artículos si cumple con estandares mínimos de calidad. Este no los cumple.El abrasivo funciona bien, el lado 1000 se me hace bastante más grueso que una piedra Shapton 1000, deja marcas muy gruesas, pero al parecer eso es común cuando estas placas son nuevas. Para afilado directo podría servir como placa de desbaste.La compré específicamente para aplanar piedras de afilar. Recién llegado verifiqué con una regla (certificada 0.001 pulgadas) si estaba plana la superficie. Para nada. La parte del centro de la piedra es bastante más gruesa que los extremos. No tenía galgas a mano, pero usando papeles de diferentes espesores pude comprobar que un papel delgado (de ticket del super) pasa debajo de la regla hasta una tercera parte de la piedra (foto). Esto pasa de los dos lados y también está convexa a lo ancho.Midiendo con un calibre encontré que hay una diferencia 0.3mm entre el centro y los extremos, está muy curvada la superficie. Eso la hace básicamente inútil para aplanar cualquier cosa, le va a transmitir la curvatura y luego la piedra a la herramienta que esté afilando. No sé si el control de calidad es muy malo y este producto claramente defectuoso pasó ese control o si estas tolerancias son el estandar de calidad de SK11. En cualquier caso la pésima calidad hace que el producto no sirva para lo que lo quería usar. Voy a ver si tiene algún costo hacer la devolución, ojalá pueda recibir el reembolso. Pero dejo el review para otras personas que piensen en comprar esta placa pensando que es un artículo de calidad. No lo es.

このレビュー読ませていただきましたが、誤解している人が８割いるののに驚きました。この砥石は、表面のザラザラのダイヤモンドが取れて、初めて番点に近い粒度で研ぐことがてきますよ。私も150-600と400-1000の両方を２年以上使っていますが、性能低下は感じていません。説明書に書かれていたと思うのですが、基部に張り付いていないダイヤモンド粒子が最初は剥がれて粒度は荒くなりますが、剥がれた後は、安定した粒度になる様なことが書いてありました。私は、普通の砥石と比べて、極端に砥力が高いとは思いませんが、セラミック砥石よりも確実に高いです。皆さんが言ってるように、平面性が高いので鑿、鉋、出刃、柳葉などの平面性が大切な刃物の荒研ぎ、中研ぎに重宝しています。

Der Schleifstein ist gut aus Japan angekommen, hat aufgrund Post und Zoll jedoch länger gedauert als gedacht. Trotzdem ein herrliches Werkzeug

セラミック砥石や本砥石は使っていると、少しづつ削れていくので修正が必要になります。しかし、このダイヤモンド砥石は6mmの鉄板なので、余程の力をかけて曲げない事には平面のままなので、ダイヤが剥がれるまでずっと平面なのです。私は、刃物のかけ修正やナイフ造りでの刃先の微調整に使っていますが、これでセラミック砥石の平面修正もしたりしますので、一番使用頻度の高い砥石かもしれません。私は「#150/#600」と「#400/#600」の両方を持っていますが、どちらを悩んでおられる方には、・大きな歯欠けの修正で使用をお考えなら　#150/#600 がおすすめ・ちょっとした歯欠けしかしないよって人には　#400/#1000　がすすめ因みに、当然これ一つで仕上げまでは出来ないのです。

刃こぼれした出刃包丁を直すのに購入ガリガリ削れます本当に#150なのか？裏の#600でもガリガリ削れます本当に#600なのか?無事に刃こぼれも直り普通のセラミック砥石で仕上げました(*^^*)そのあとナニワの超セラミック砥石#400をこれで面直ししたら驚くべきスピードで完了(・・;)ダイヤモンドはやっぱり凄いな～と思いながら、面直しした砥石にステンの直尺を当てて確認したら・・・砥石の真ん中が膨らんでる～( ＞Д＜；)何でだと思いダイヤモンド砥石の砥面を触ってみたら　真ん中はツルツルで端はザラザラ・・・さっき研いだ出刃包丁で真ん中だけダイヤモンドが剥がれていました(ショック)・・でも・・このザラザラをみんな取ったら砥石の面直しに使えるかも・・と、思い遊びのつもりで以前買っていた100均の砥石を使ってこすってザラザラを全て取り除いたら手で触ったらツルツルですが砥石の面直しには問題なく使えました素早く面直しが出来て、直した砥石の砥面も綺麗です(最初ザラザラが残っていた時は砥面も傷だらけでしたが・・)耐久性はわからないけど今のところは問題なく使えています砥石の面直しに使うのであればまずザラザラを全て取ってからした方がいいと思う寿命が短くなるかも知れないけど・・(自己責任でお願いします)