Volcano Carbide BitCoarse Levels & Uses:- Fine (F): Ideal for light refinement and gentle cuticle work on natural nails.-Medium (M): Perfect for refining and smoothing thicker layers like acrylics and builder gels.- Coarse (C): Best for faster refinement of acrylics, gels, and dip powders.- Extra Coarse (XC): Designed for quick removal of large amounts of acrylic, builder gel, or dip powder.- Double Extra Coarse (2XC): Heavy-duty removal for thick enhancements; ideal for professional use.- Triple Extra Coarse (3XC): Extreme bulk removal for the thickest layers of acrylic and builder gel. For expert-level use.Disclaimer:These coarse level bits are recommended for intermediate to professional use due to their aggressive filing capabilities.