files are not but the nail buffs are [SEP] the grit is not very strong on the nail rectabgle buffs and files but on the buffers with all the different sides it is really strong and really good just harder to file short nails with that said it was still able to file down acrylic nails it just took a little longerbut i really like the buffer files with the different sides my damaged nail from acrylics was easy to smooth down to paint over it the brushes are nice and do their job well as well and it comes with plenty so i know it will be awhile before i run out