@rundocuri- I have soft nails that damage easily too, and I have found that I can't use files and emery boards that are too coarse. The finish on them catches parts of my nails, and causes them to tear and chip.
Crystal nail files are great for people with delicate fingernails, because they do not have coarse finishes that can be damaging. These files work great for shaping and smoothing your nails.
Though a crystal nail file is not as good as a coarse nail file for shortening your nails, trimming them with scissors or nail clippers then smoothing them out with a crystal file works just as well without snagging or splitting your nails.