The base material of the 13 cm matte sapphire file from Becker Manicure is a hardened stainless steel file blade. Sharp-edged corundum grains and sapphire fragments, as well as sharp-edged abrasive material, are embedded into the file blade. To prepare and finish the nails, the sapphire file is equipped with a coarse and fine side. Manicure tools such as the high-quality file from Becker are characterised by smooth file blade edges. As the beauty tool for manicures and pedicures is one-piece, the sapphire file is particularly robust.