Create salon-quality nails on the go with the brushworks Crystal Glass File, an easy tool for tidying up your manicure. The nail file is durable and long-lasting and can be used on natural and false nails to create your ideal shape. It is a long-lasting glass nail file that can be used for natural and false nails. The abrasive surface is ideal for filing all nails and it is a professional quality crystal file. It can be used wet or dry.