PERFECT for my soft, thin nails that layer & tear easily.
I have thin, very soft nails (all my life) and regular files/emory boards destroy them.  These files are Excellent....they seal the ends of my nail as they file.  My nails do not split now and tear a LOT less easily.  I read the reviews before ordering.  I have been using these weekly for a few months now....they file just as well now as when I first got them, I am not specially gentle with them, toss them in my purse and work tote.....none have broken.  I ordered a set for my mother as well.  We LOVE them and would order again if we needed more.  I have had None of the experiences the negative reviews mention at all.
Rating: 5 stars