DMT DiaFold Portable Sharpening Stone - Double Sided, Foldable Diamond Knife Sharpener for the Workshop, Jobsite or Kitchen - Coarse/Extra Coarse - Non-Slip - 9.5L x 5W x 3.25H Inches

I purchased this sharpener as an addition to my DMT Magna-Guide Quad kit, to have an XC (Black) surface that is compatible w/ the system. I opened the butterfly handles, and noticed about 4-5 very shiny scratch marks on the Blue Coarse side of the sharpener. It appears the plastic handles have scratched some of the diamonds completely off the paddle! So, I decided to break the sharpener in on my Cold Steel Heavy Machete. Both sides worked quite well, and when I sprayed them w/ water to lubricate the sharpening paddle, no other scratches were noted. The machete itself still needs a once over w/ a Dremel, file, and crockstick to meet my standard, but thats not DMTs problem. These sharpening grits (XC-C) produce a rough, very "toothy" edge on tools, and you really need DMT Red (F) to actually achieve a good sharp utility edge IMHO. If you use this XC-C sharpener on your knife, (Take it EASY!, NO PRESSURE NEEDED!) don't expect to be slicing paper and shaving hair w/o a DMT Red (F) and Green (XF), or some form of hard white ceramic hone to complete the work. I will contact DMT about the scratches and update. Great sharpener, and highly recommended for preliminary refining of established bevels on knives and axes, hatchets etc., removing small dings and chips or careful first stage roughing in of a convex grind by hand, but it will be hard to use on curved knives like khukuris. The edge you produce will be far finer and sharper w/ DMT diamond hones if you use all the stone grits in progression obviously.

If you sharpen your knives along the existing factory edge angle, eventually you might find that the blade seems to refuse to get really sharp anymore. That experience is more likely if the factory edge came with a relatively obtuse angle, as is the case with some of my pocket knives. That’s because repeated sharpening along such edge angle is liable to make the cutting edge even more obtuse. Since I strongly prefer to keep my knives very sharp, such changes in the edge angle and the consequent loss of sharpenability initially were disconcerting to me, to the extent that I almost wrote off the knives in question as lemons in terms of heat treat. Eventually it dawned on me that such blades may need to have their cutting edges reprofiled into a more acute angle. That’s why I am glad to have found this sharpener: I use the extra coarse side to narrow the “shoulders” of the cutting edge and then the coarse side to smooth out the surfaces of the edge, and this sharpener with its diamond coating does a very effective job at this task (although patience may be required as many strokes on each side of the cutting edge may be needed to change its angle). Once the reprofiling is done, my normal means of sharpening can take over and bring the screaming sharp edge back to life. Using this approach I have been able to revive 4 or 5 knives in my collection, plus my wife’s kitchen cleaver, to their former glory. I also like the broad surface of this sharpener as it is less likely to slide off the tip of the blade - which may dull such tip - at the end of each sharpening stroke (in contrast to, for example, Spyderco’s Sharpmaker rods, which are much narrower and a bit harder IME to control near the tip of the blade).

Sharpens great , I've been looking for one of these diamond sharpeners in coarse . It sharpens in a hurry and that is what I need , if you have time or retired with nothing better to do you can sit there and hone for perfection . While the sharpening surface is fantastic , the handles appear to be very fragile and I'm certain will not last long . for the price paid I did expect better . Will keep because even when the handle breaks the sharpening surface will still be useable .

I picked this up to have a well rated sharpening tool with a good reputation I could carry with me at work. I carry a pocket knife that sees a lot of use, but also use tools on the job that need to be sharpened, and you don't always want to carry a full sized file with you. Fortunately, this folds and fits easily in your pocket. The extra-coarse side cuts a lot of material from an edge to get it back into shape from nicks, and the coarse side is still pretty aggressive, but also smooth enough to get my pocket knife shaving sharp. It's also done a great job on my brush blades, ditch bank blades, pullaskis, rogue hoes, and pretty much everything else I've tried to sharpen with it.

I purchased this sharpener with the kit that keeps the angles consistent. Using the two together, this sharpener took a 20+ year old knife that would have made a pretty good club, and made it dangerous again! I honestly believe this will put a blade on just about anything. I haven't used it long enough to give you a "test of time" report, but it's been great so far! Be careful though - the "extra rough" side will wear metal away quickly. It definitely takes the burrs out of a blade!

I only wish I would have discovered this sooner. This stone makes all my other sharpening stones (aside from my DMT Fine version) pointless. The Extra Course side is I think 220 grit so just like 220 grit sandpaper it removes metal just as fast except it basically never wears out! The folding design is absolutely perfect for storage anywhere and doubles as a sturdy handle, they even put slots in the ends of each side so the stay aligned as you manipulate the tool giving you perfect control. The Course side is 320 grit and is equally great. For most people this will produce a very acceptable edge without the step to a finer grit.

Very Quality product, I've had them for over 5 years now. Still sharpened all my knives very well. But to get the razor sharp edge will depends greatly on the person who use it.

Use this very gently as you could easily shave off the diamond dust with hard pressure !! Very light pressure works best, with a few added strokes across the surface instead of digging the blade into the surface. A moderate buy, but with caution to hard use. Could be used with water for lube quality and ease.

Affûtage grossier.

Qualitativ sehr gut. Langzeitbewertung folgt.

Works as intended.

I have a couple of other Diafolds, bought a few years back and still going strong. They're great. Sadly, they seem to have changed the design since I bought them - the current production has much flimisier-feeling handles, which are a lot more bulky and no longer properly cover the abrasive surface when closed, which can be an issue when thrown in a bag pocket. The abrasive still seems to be of the same quality - DMT are absolutely great at diamond abrasives. However, the much bulkier and bendier handles do affect the most typical use case for these- that of a super-packable and robust sharpener that you can throw in a bag without worry. The exposed abrasive is a worry.

Estos calibres son demasiado abrasivos... no los usen para hojas delgadas a menos que sepas lo que haces. Recomendables en jardinería, carpintería, entre otros. Donde necesitan afilarse tijeras, machetes, formones. Donde uno debe cortar de golpe. No tiene caso filo de rasurado ya que de un golpe, lo amellas. Pueden hacerse nuevos biseles en cuchillos. Pero insisto. Debes saber lo que haces. Es una herramienta casi imposible de conseguir en ferreterías.