Wears out quick.
I never used nail files before but I am aware it is supposed to be healthier than nail clippers.  After 1 use the rough part started to come off.  Maybe why they sell more than 1 at a time?  Perhaps I press too hard?  I used the next one more gentle and the rough part still comes off.  I am going to try genuine Czech made files for comparison.  You get what you pay for.
Rating: 4 stars