This new pedicure foot file is 100 percent sanitizable and is made up of sturdy high-grade stainless steel. It provides a firm grip and leverage for tackling the toughest callus. The new intro file kit consists of 1 dual-sided metal foot file, 1 pack of 15 White 180 grit (medium) and 1 pack of Black 80 grit (coarse) disposable filing.