Ultra Sharp II Diamond Sharpening Stone Kit - Medium and Extra Fine

These stones are pure quality. I use them first, and sometimes follow up with a couple of water stones. But honestly, if you sharpen with these and then strop, I'm not so convinced the whole water stone part adds much if anything. I use the coarsest of these three stones to flatten my water stones. I don't expect to wear these out. A younger man might do so over a number of years? The 3-inch width is nice. You can get by with narrower stones, but if you can afford the 3" width stones, get 'em.

I read a lot of mixed reviews about these stones but I decided to take give them a try and have used them quite a bit in the last few months I even used the 600 for a reprofile on a bigger blade don’t believe everything you hear these are really nice consistency of the coating is good I did a good break in and have treated them well an I don’t see any major tear out still cutting great

I use these diamond sharpening stones primarily to sharpen tungsten carbide inserts to a fine edge using WD-40 as the cutting oil. It always takes less than one minute on the 600 grit stone then do the same on the 1200 grit stone and the cutter is ready to use again. I have also use it to sharpen a 70 mm hinge boring bit that had two dull side blades. Worked so well I have used the drill bit to drill two more holes since in seasoned oak and Bois d' arc to depths of more than 6 inches for each hole.

Heavy steel substrate and very flat. Using it to hone carbide lathe tools and it works fast with just a drop or two of water. Good price point.

These diamond stones cut aggressively, at least when they are new. This is really nice for flattening machine marks out of new chisels and plane blades. I've primarily been using wet or dry sandpaper with water on a granite flat stone for the bulk of my sharpening work. This works well but I wanted something more aggressive and longer lasting than sandpaper for both new items (they almost always need a major work over) and for restoring old rusty and warn out tools. These stones are big enough and seem quite flat. They are heavy and appear to be a very good deal. They should fit well in any wood shop or other sharpening systems. The 600 and 1200 grit seemed most practical for my purposes.

These work pretty good but they need to be longer to work with a jig. Also it would be nice if they were engraved with the grit from the mfg.

I buy a lot of products on Amazon but Im that a-hole that never leaves a review. After spending the last 15 minutes ranting and raving to my buddy about how much i loved these stones I figured it's time to leave a review.It seems like most of the reviews of these stones are of people using them to sharpen chisels or wood working equipment. I use them to sharpen my Benchmade knife that has an s90v blade. The steel is so hard on that knife that a normal wets tone just doesn't cut it. These stones make very short work with touch ups and putting on a new edge.Word of advice though to the noobs of diamond stones out there. Let the stone do the work, it doesn't take a lot of pressure to take material off. Give it slight pressure with, slow smooth consistent strokes and you will have a very sharp blade in no time. Its a very aggressive sharpening stone and doesn't need or like hard pressure.

I purchased this set to fit a dovetail rear sight. I used water and it performed well. Got the dovetail lowered and fit. Rinsed and dried them and put them back in their boxes. This weekend I went to fit a dovetail mount for a red dot. Wet them down and started. Checked periodically and the bluing was coming off but it was taking significantly longer. rinsed and dried and checked them. Except for the corners where I didn't go they are completely smooth, no grit at all. I can still feel grit on the corners. This is a major disappointment and I'm stuck until I can get to the store. Guess I'll go with wet/dry sandpaper!Update May 28, 2019 The seller has been extremely prompt in correcting the problem by sending me another set via Priority mail. I will update again after I have a chance to use them.Update: I have been remiss in not updating before now. The second set has performed well on multiple items to sharpen, change profile, etc. They still work fine and I would recommend them. The first set must have been a fluke. Sometimes that happens.