I have three of these nail files. I have one in each size, small, medium, and large. I recently purchased metal cases for the small and medium ones. First, I was attracted to the beauty of the hand-painted designs. They are both vibrant and delicate. What I love most though is that the grit of them is perfect whether I need a heavier grit or minimum. I’m not sure how they are made that makes them perfect without needed Emory boards in a variety of grittiness. I won’t need a jar full of Emory boards and files now. My Classy Nail Files are the best.