What are the 6 roughness levels on files?

Files are categorized into six roughness levels based on the coarseness of their teeth: Coarse, Medium, Fine, Extra Fine, Dead Smooth, and Rasps. Coarse files have the largest teeth and remove material quickly, while fine files have smaller teeth for smoother finishes. Extra fine and dead smooth files are used for precise finishing and polishing. Rasps are typically used for shaping and removing material from wood or soft materials.