10-Piece Precision Needle File Set 120 Grit, Super Hard Nickel Coated Diamond File Set, Jewelers Files for Filing Metal Ceramic Stone Jewelry Glass 5x180mm

A nice set of variable shaped diamond files. The durability seems low (but i am sharpening roll hardened stainless, for those that know, so my expectation may be excessive). After a good sharpening event (just one file used) i expect a file will hold up to at least 3-6 more uses, for me thats 6 months. I like how diamond files sharpen on booth the forward and back stroke. Diamond will cut (sharpen) things like hardened steel effectively. I will be sharpening for quite some time with this pack. Will buy again.

High quality. Buy with confidence!

They are good, but when using on hard things like stone, they do wear out more easily. I bought these 10 months ago, to give everyone a general idea. You also have to be careful when cleaning them, because they will rust and get gross if you do not dry them thoroughly.

But they work well

Diamond grit is bonded well and in consistent pattern. I've used others that are good for only a single use, and this set has replaced all of my others and is used often. I use these for creating decorative filework on my custom knives. Works well even on hardened steel.

Files work well in shaping rock material including quartz. The harder materials cause some degradation and loss of abrasive and some of the files that are used frequently likely will not last more than a year. That is well within our expectation bases on the application and experience.

Bought these files for designs on knife spines with extra hard metal, so far so good.

These files have a very effective abrasive finish and each shape has its uses. I'd give them a higher rating if they were made a bit more precisely. The triangle and narrow triangle saw sharpening files in this set would be better if the edges were more precise. Still, they're capable of putting a wicked (if slightly imprecise) edge on the teeth of worn bi-metal oscillating saw blades that cost more than this entire set of files, so even if I knew how imprecisely these things were made, I'd purchase this set again anyway. A bit more Q/C in some Chinese factory, and this set would be too good to be true. Even as-is, it's a decent buy as long as you don't require too much precision. In that case, you'll need to just pay up and get an expensive precision file.