Durable, Long-Lasting, Reusable Czech Glass Files - Bona Fide Beauty nail files are tempered (strengthened) so that this manicure tool will last a longer period of time. The high grit is part of the nail file body and is not sprayed on.
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.