Machinists Boxed Half-Round Files, 4 in, Bastard Cut

Features: 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