Material: Made of ceramic with good heat dissipation that will not burn your nail beds. Functions: Great for sharpening, grinding, polishing and reshaping acrylic gel nails and removing dead skins, quickly achieve shiny smooth nails. Features: High hardness, hard wearing, high temperature resistant, corrosion resistance. 5 Coarse Degrees: XC, C, M, F, XF to satisfy different manicure needs. Application: For professional nail salon, beauty parlor, spa or personal manicure pedicure DIY.