Laser-etched with thousands of micrograins, our nanoglass file enables precise shaping and smoothing, while protecting nails from breakage by helping to seal and compress keratin layers. An additional 3-sided buffer smooths and flawlessly polishes edges and surfaces to your desired shine. Gently move the nanoglass nail file in one direction across the top and edges of each toenail to file nails down to the desired length and shape. Then use the buffer in the order of the 3 steps indicated on the block to leave the nail smooth with a beautiful shine. Clean buffer and file with rubbing alcohol and a cotton swab after each use. WARNING: Keep out of reach of children. This product is not intended for use by children. Intended for use on hardened or callused skin. Stop using if skin becomes irritated or inflamed. Do not use on broken, irritated or sore skin. In case of circulatory impairment, diabetes or other diseases that affect foot health, seek a physician’s approval prior to use.