Natural Nail Strengthener - Bona Fide Beauty Czech glass nail files seal the keratin layers at the nail's edge, leaving your nails smooth and healthy. The nail filers are ideal for all types of nails (thin, thick, sensitive) | Comfortable Finger 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. | Durable, Long-Lasting and Reusable Czech Glass Nail File - 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! | Easy to Clean - To clean a glass nail filer, rinse it under cool running water to remove nail dust. Apply a small amount of mild soap and optionally use a soft toothbrush to gently scrub the surface. Rinse thoroughly, let it air dry, and once dried, it can be used again. | Made of Glass - Although tempered Czech glass is stronger and handcrafted with love and care, it is still prone to breakage if dropped or tapped against hard surfaces. Handle with care, and treat it like you would a favorite margarita glass