4 Pieces Diamond Sharpening Stone Grit Diamond Plate Honing Stone for Kitchen Sharpening Dull, Blunt or Tired Edges, 5.9 x 2.48 Inches(400/600/1000/1200 Grit)

They work well. The review form asked about "accuracy". I couldn't tell you how accurately flat these are, or if the grit is on spec. But they're handy and do the job. Some reviewers mention that these stones wear out fast. To those people I say "you're pressing way too hard, let the tool do the work". I'm sure mine will wear out eventually, but I've been using them for some time now with no deterioration. I'd say they're worth the price, and if you're particular about sharpness of your tools you will achieve it with this set.

This set of diamond sharpening plates it nice quality and gets great results with chisels, plane irons, and other shop tools. I mounted them to a scrap of shelving stock and they are nice and flat.

These were perfectly flat when I received them and were easy to glue to a board for use with sharpening my hand planes and chisels. I don't expect them to last forever but for a hobbyist that only needs occasional sharpening they work well and are an inexpensive way to get started with diamond plate sharpening stones.

I've started woodworking with traditional tools and have needed to do tons of sharpening chisels and plane irons. These plates have been at the center of my sharpening and I've spent days honing the blades. These plates have been reliable, give a fantastic edge, and have kept their honing ability. The cost is low and it's been a fantastic addition to my shop! I highly recommend these plates!

I bought these diamond stones to use primarily in the wood shop for hand planes and chisels. Before I set them up in the shop I took the opportunity to break them in by sharpening a handful of my pocket knives that had been badly neglected. For these tough and hard used tools, these stones worked great. I was able to quickly reprofile edges that had been chipped and get my pocket knives into good shape relatively easy. However, when I went to set up a new hand plane and sharpen the iron I noticed a problem. The scratch pattern on the bevel was not even across the iron when using the 1000 stone. The center was getting more wear than the edges. First thought was my technique as I’m pretty new to woodworking and not as comfortable as I am with sharpening kitchen or pocket knives. I finally put a straight edge across the width of the plate and found it to be cupped ever so slightly at the center. On just the 1000 stone, the center sits probably 1/32” higher than the edges. The other three are fine. That’s a real bummer because the 1000 is my go to for most maintenance sharpening. For the hard use and borderline abuse I put my pocket knives through, these diamond plates are more than good enough. But for my woodworking tools that demand a higher tolerance, these aren’t going to cut it. I was a little skeptical of these with the thin plate and foam backing, but the price can’t be beat. For jobs requiring absolutely flat plates, I broke down and bought the expensive DMT diamond stones. I’ll still probably use these ones for less sensitive jobs.

These diamond plates shipped and arrived quickly, no issues. The plates are thin so a sturdy flat surface is a must to rest these plates on when sharpening. Because they are thin, it's nearly impossible to butt the plate against something thinner to prevent from slipping forward when sharpening. But at this price, it is as expected. Hope this helps.

Never used diamond files before, but the guys at work love them, so I ordered these. They really put a nice sharp edge on a knife. Easy to use and quick if your blade isn't really bad.

I found these of good to high quality. Easy to use and a good size for almost everything. The 400, 600, 1000 grit work perfectly. Strangely, the 1200 grit acts rougher when it should be the smoothest. I don't know if it is mislabeled, a defect, or just have high spots. if it doesn't flatten out I will rub a sharpening stone over it lightly, then I'll know.

Came on time and product is excellent

If you are looking for a starter set of sharpening surfaces these will work just fine. Get a bottle of automative glass spray and get on it. You may buy expensive oil stones and water stones later. This will get you going for a great price. I have been using them for a few months to sharpen wood working tools. Haven't seen any degradation yet.

Ich habe diese "Steine" auf Empfehlung von Rex Krueger beschafft und bin sehr zufrieden damit. Man sollte allerdings eine Unterlage einplanen, da sie sehr dünn sind.

I didn't read the product description so I didn't realise they were thin and one sided only (rubber backing). But I was able to sharpened some knives with good results (I'm not a pro) on some of them. I guess it depends on the knife's material.

Pay attention to the dimensions. They come exactly as described but some of the pictures make them look larger than they are. Other than that the quality seems fine.