ACHIEVE STRONG NATURAL NAILS - Regular use of premium Czech glass nail files strengthens and hardens natural nails. With every nail filing you will notice that your natural nails will chip, split, break and peel less. Say goodbye to irritating broken nails and hello to long and strong nails. | COMFORTABLE NAIL FILING - Unlike other popular nail files, Czech glass nail files can be used in both directions. Expertly trim and shape your nails with comfort, ease and efficiency at home! Bona Fide Beauty nail files provide a smooth and gentle filing experience without irritation. | NEW NAIL FILE, NEW YOU - This high grit Czech glass nail file will seal the keratin layers at the nail's edge, leaving your nails smooth and healthy. | DURABLE CZECH GLASS - Made of premium "Bohemian" Czech glass that is tempered (strengthed) to ensure the glass file is strong and will retain its grit over a long period of time. This is not a nail filer that would be tossed into the garbage after only a few uses! Many Bona Fide Beauty customers say that Czech glass lasts up to 4x longer than their old nail files. | PROTECTIVE HARD CASE INCLUDED - a protective hard case is included to keep your nail glass safe. It is ideal to put into your travel bag, purse, or manicure kit. Keep it close by and always be ready.