DMTD2C 2.5-Inch Dia-Sharp Coarse Diamond Mini-Hone - Clear

I've used these to put new edges on my Forstner bits. And after a couple of strokes with the green file, the edges are restored. It should be noted that they are not to be used as files, IE to remove a lot of material from any edge. They are used to hone a dull edge.

Have used once for sharpening three garden pruners which were still cutting but not very well so tried about 50 strokes per file total working down through grits, Have sharpened ok but worn blackened ( therefore lost cutting layer? ) spots and 0.5cm black more dotted areas already appearing on all three files as well as silvery "scratch" marks over half of green file area. So either its a very thin layer or not fixed very well- maybe only for rather delicate final finishing use? I haven't any experience of using such, and may have pressed too hard at times in both one direction and circular motion( but not that hard!) , - May try using coarser grit first next time but surely for this price per small file the build should cope with this use. Check some recent Amazon.com reviews.

Handy for me for sharpening knives router bits etc remember thou this is extra fine so its more for putting that fine edge on an not for tools or knives that have nicks in there cutting surfaces

Work very well at what they do and I used them to put an edge back onto a circular saw blade whilst in situ (and unplugged). However given the premium price and high brand value name DMT, they do feel a little flimsy. I'm sure that with care they will last long enough and be a useful tool in my sharpening box, but somehow I expected a little more heft.Overall a decent set of diamond hones that work well on small edges.

Really useful and very easy to carry around - and they get the job done fast !

bought this to replace the lost one from my pack of three, Blue, Red and Green Honing tools. I've been using their products for many years now, keep my knives, both Kithen and Tools razor sharp, chisels and Stanley Knife Blades. I rarely replace Stanley Blades any more, a light touch with these and they're good as new.

Very good diamond file use it on turning tools

Not really happy with them