Machinists Boxed Half-Round Files, 14 in, Bastard Cut, Curved/Flat Single Cut

Used on concave, convex and flat surfaces. Rounded on one side, flat on opposite. Flat sides of all half-round files are double cut. Backs of all 4 in and 6 in files are single-cut. Backs of all half-round second-cut files are longer than 6 in are double-cut.