Coarseness Rating

Hand File Coarseness Rating

Hand files are available with various types of coarseness ratings. There are two types of coarseness cuts for hand files: American pattern and Swiss pattern (for precision files). American pattern files have three types of cuts: coarse (also called bastard), medium (also called second), and fine (also called smooth). Swiss pattern files start on a scale of #00 (coarsest), and go up to #6 (finest).