This Review Title is These are very rough on natural nails. and the content is: I really liked the size of these and that they had different grits on both sides. The problem if using on natural nails is that one side chews away your nail and not even at all. It's like taking a saw blade to your nails.<br />The other side isn't quite as rough, but the "grit" just crumbles away as you file. I was very disappointed in these..There are other information for this review, one is This reviewer did purchase it and the other is 0 people think this review is helpful.