Made using the finest crystal, the Crystal nail file is the only nail file you\'ll ever need. Leighton Denny\'s famous crystal nail file turns the nail to dust. Using the finest lead crystal that has been carefully treated to creat the perfect nail file. Traditional nail files can leave the nail edge rough or uneven, but the crystal nail file causes no trauma to the nail. It simply smoothes the nail completely, sealing the free edge, leaving not a trace of a split or catch.