This Review Title is Extra coarse, too rough for any usage but on rough heels. and the content is: Extra coarse on both sides, which I didn't expect. I was disappointed with the fact that it is too coarse to use on anything except rough heels. Don't buy this product for your nails, you won't be able to use it..There are other information for this review, one is This reviewer did purchase it and the other is 2 people think this review is helpful.