DMD 5-Piece Diamond Sharpening Stone Set for RUIXIN PRO RX-008 & RX-009 Fixed-Angle Systems | Grits 240#, 360#, 600#, 1000#, 1500# | Precision Honing for Kitchen & Outdoor Blades

Great value for what it is. They're not Venev or PDT quality, but they leave a nice finish and they're a lot cheaper. Even if they wear down faster, these aren't a bad option for someone trying to find cheap diamond abrasives for their fancy knife steels with a ton of carbide content.

These make for very good quality resin bonded Diamond Stones at a fair price. While there are definitely better by Brands like venev, hapstone, PDTools etc etc nothing can touch these for the dollar. You get four good performing resin bonded Diamond Stones for $50 when your major brands are charging upwards of $80 for one single Stone. I see people talking about these stones are too small to work and complaining about that these stones are not for free hand you can use them for freehand but they're made in a 1x6 pattern for fixed angle sharpeners that's why they are sized as they are. So if you're expecting a benchstone this is not a benchstone this is a 1 by 6 in fixed angle Edge Pro Style mounting plate resin- bonded Diamond Stone. They cut quickly they have very little grit contamination they don't load up overly bad until you get to the 12000 Grit which is very common the higher the great you go the more they load up but the 1k, 3k, 6k don't hardly load up at all which is very nice the 12K does load up but not terribly that's just part of resin bonded Diamond Stones or resin bonded diamond or CBN doesn't matter it's just part of resin bonded stones. These have very high concentration of diamond more so than your typical resin bonded stones. The diamond concentration in the stones is part of why they cut so fast now I will say this the stones do not cut true to Grit they are not as fine as they are stated. The 1K is more like a 600 the 3K is more like a 1500 the 6K is more like a 3K and the 12K is more like a 5K of your traditional JIS grit ratings. Now the 12K will absolutely give you a mirror edge finish but you with a visible to the eye scratch pattern at certain angles as you're moving the knife around in the light. Still for $50 you can get a set of resin bonded stones that will last you many many years with a lot of use and a lifetime for people that don't sharpen that much that's capable of taking you from a mid-grit to a full mirrored Edge if that's what you're looking for. Nothing else comes close to these for the money not even in the same universe. Now if a professional or someone looking for professional quality edges and the great contamination will be a problem for you than these stones are not for you because there is some great contamination that's why the stones react lower than the stated Grit because of that great contamination. Now if you're not looking for extremely fine Ultra consistent finishes then the stones will do great for you if you are looking for those extremely fine and consistent finishes then you're going to have to spend more money on a premium Stone brand. Dollar for dollar the performance is better than anything out there but you do have to keep that great contamination in the back of your head and that will determine whether they're worth it for you or not.

The media could not be loaded. Don’t have experience with any other resin bonded diamond stones but these were a definite upgrade to the diamond stones I was using. They need to be lapped before use but cut fast and give a mirror shine at 12k. Not sure if they are true to grit, but the higher grits don’t cut deeper than the lower ones. A complaint I’ve seen for the other DMD resin bonded stones on Alliexpress.EDIT:After closer inspection of the apex under a digital microscope I’ve changed my opinion on this set. There is clear tear out at the apex due to contamination of the stones. So I’m taking off 2 stars from my original review. Overall I think it’s probably best to invest in cheap diamond plated stones and a good higher grit resin bonded stone from a more reputable company.These do work, will last many years since it’s 3mm thick and will give you perfectly acceptable edges for everyday tasks.

The stones are aggressive, which is good, but they are removed gently.

Stones work perfectly in multiple sharpening systems. Quality is good and the abrasives feel of better than decent quality. Carrying case is great and separates stones while keeping them all in convenient place. Only issue with it is the clasp on the box looks to have been manufactured poorly and doesn’t stay closed with out having to put in extra effort. Overall a great item.

I have the other variety, the standard Diamond plates (the 1x6), and these Resin Bonded on the way. A lot of people will make a comparison to the "AliExpress" DMD Resin Bonded Diamond plates you see out there, but I am here to tell you, those are NOT TRUE to form for DMD. Up until this point, DMD was not selling direct to customer, because they OEM for MANY retailers. Chances are, depending what Resin Bonded stone you may have used prior to these, is most likely a DMD product.. They don't put their name out there, because they don't want to compete with their OEM partners.The ones you get on AliExpress are DMD by name only.. you MIGHT get some here or there that are truly a DMD product, but I have talked with DMD directly, and they have assured me that the ones you get on AliExpress are all clones aside of maybe a few that slip through here or there. Those style DMD Resin Bonded plates are not US market items, and were made to a certain spec, a "price point", to stay low. Of course quality is sacrificed to fit the price requested by the customer or the specific market for which they were made.These are Amazing Resin Bonded stones, and a great value for the price, you cannot beat them in that regard. They are true grit, and work as intended. Do not hesitate if you are on the fence, get them!Also, education on the AliExpress market stones and what they REALLY are, search on youtube for "DMD Resin Bonded Diamond Plates - The TRUTH once and for all + Demo of all 4 with closeups" and you will see exactly what I am talking about.

The resin stones are fine. They’re what you expect at this price point. They truly do have diamonds imbedded in the resin, but they aren’t true to grit and there’s some random contaminants that will leave deep scratches on the edge of your knife or even microchips depending on the pressure you’re sharpening with. Comparing these stones to others I own the 1,000 is around 600 grit, 3000 and 6000 are almost identical in grit at around 1000ish, and the 12,000 is maybe 6,000-8,000 grit. If you have a guided system that can use these stones then they’re a decent budget option, but personally I would skip buying these and go for the ruixin pro resin bonded stones on a budget.

Works as advertised. Good product.