Review title is Too Rough For Me to Use [SEP] These are o.k. nail files, but I wouldn't use the gray side at all as it too rough.  I would use the buff side to actually file my nails - if I wanted to use them.  I find the thickness of the nail file a little hard to hold and will continue to use my wonderful slim glass nail file and super fine sandpaper to smooth the edges.  I play and teach classical guitar and I need my nails to be just right to get good contact with the strings and these nail files leave my nails too rough on the edges.  They are well packaged and colorful and would make a nice gift for someone who isn't as fussy as me about their nails.