Filing with Ruby Stone feels good and is kinder to nails than other types of files. Compare the smooth action of Ruby Stone with the unpleasant grating of ordinary emery boards and metal files. The Ruby Stone Crystal Nail File is less likely to tear or fray even the most fragile nail, promoting the vigorous growth of smoother, healthier looking nails. This file has a 9.5 degree of hardness and is made of aluminum oxide powder crystals (one of the basic materials found in rubies). It can be moistened for easier and more effective filing (especially for very hard nails), and you can file in both directions without hurting the nail. Because of its hardness, it will never go blunt—and it can be washed and sanitized.
