Glass nail files are ideal for filing and shaping or buffing natural nails because they seal and protect the edge of your natural nail from debris. Leaving the nail edge “open” means dirt and water can leech inside the nail itself causing chipping, cracking, peeling and weakening of the nails. Glass or crystal nail files can be sanitized with alcohol, under a UV light or heated in an autoclave safely without damage. Use as the final step of shaping your natural nails after clipping or trimming. Or buff nail plate to healthy shine when wearing nails natural or not prepping for gel polish.