Sally Hanses Sapphire file — curved surface shapes, smooths and finishes...

This is by far one of the best nail inventions! In a matter of seconds! Unlike those old-fashioned steel nail files of the past, this sapphire file has two fine gritted sides for filing and a contoured handle for a better grip.  The inner one is slightly coarser than the top side so you can easily smooth out fingernail length and shape.  On the other hand, the top side is for the finishing touches with an excellent finer grit that miraculously got my manicure done more quickly than using normal emery boards. I’m amazed!