Diamond Machining Technology (DMT) W7EFC Diamond Whetstone Mini Diamond Stone - Coarse / Fine / Extra-Fine - Set of 3

These are a must have sharpeners. They're portable, very light and quality. Different grading, there's fine, coarse and finer. It's safe to use. Works really well. Sharpens your knives fast,efficiently and effectively.

Quick shipping. Works great. Designed for smaller blades

DMT is a great brand and I was happy to find these for the price. To me they are a good value but IF YOU ARE NEW TO SHARPENING KEEP READING. These are small, as is accurately stated in the product description. I bought them to keep in a tool box for touching up chisels and the like. They work great for that. I also bought a full size sharpening block to keep in the kitchen for my knives. The DMT set is great and will last for years bur is best for things smaller than a pocket knife This set is a great choice for many jobs and I recommend it, but it isn't for every job. Be safe and buy kitchen tools for the kitchen and shop tools for the toolbox.

I really like DMT products. I find them generally high quality, fast working, and long lasting. I have several. I have wanted these small stones for a while, for sharpening small items and getting into tight corners.However, I ran into this same problem with two large bench stones I ordered a while ago: they are not quite flat. That is not a problem if you are sharpening a curved edge, but if you are sharpening a straight edge, it is a problem. This seems like a manufacturing problem (though the stones arrived in a simple, unpadded plastic envelope).However, I am returning these, and trying again. With my bench stones, this worked and the second set was dead flat. I'll update if the second set is also slightly convex. Fingers crossed.6/6/22 update:Replacements were a little flatter. Decided to try flattening them myself, with some success.Bottom line: if you need an absolutely flat sharpening surface, look elsewhere. I have very flat DMT bench stones, and use them for sharpening chisels, etc. I plan to use these for hand sharpening where flatness is not crucial, so I am keeping them.

Thickness was less than I thought, so my angle guide needs a longer screw to secure these files.

OK, so, first off, like the headline says, these are really small. Yeah, I know the size is listed in the ad, which is why I'm not docking stars for that, I'm just warning you. You'll think, "Oh, that's OK, I can work with that." Trust, me, they're really really small. :DThe trick I've found is to take some non-skid material (I'm using a little square of foam drawer liner stuff) and put the stone on that, near the edge of a flat surface (because they're really thin, too, so you need to be able to hang the handle of the knife off the edge) and use it that way.Once you get the hang of it, they're really effective. They took my work knife from it's beat up "cutting wires, slicing plastic wire loom, scraping gaskets, generally not being very nice to it" former state back to a nice, polished, sharp edge in about ten minutes. But man, unless you know the trick of it, they can be tricky to use.I also dislike the fact that the stone grades aren't marked on the back, but I solved that with a sharpie, so, it's not really worth complaining about too hard, I don't suppose. Overall, they're a great deal if you need a bunch of different grades of stone for not very much money, but... yeah, they take some getting used to.

Description says: Product Dimensions 10.75"L x 3.25"W x 2.25"H This is false. The entire package isn't even that big. The stones are tiny, maybe 2 " x 1"--too small to be useful for much of anything.

First, these are small because they are stones designed for ski/snowboard tuning equipment. Yes, they can be used for other things but you are not buying stones designed specifically for knives, scissors, etc.Second, the stones are similar to what I already had and was replacing. They are exactly what I needed,Third, this came with the Coarse and X-Fine but not the Fine. That is disappointing since for touchup on skis, I needed the Fine most of all. This is also why I downgraded the rating (for now) since I needed this for to clean up son's ski edges for a race Saturday and cannot get a stone locally to prep his skis today as planned.