Files, Rasps and Punches

A file is a tool used to remove fine amounts of material from a workpiece. ... Most are hand tools, made of a case hardened steel bar of rectangular, square, triangular, or round cross-section, with one or more surfaces cut with sharp, generally parallel teeth.

A rasp is a coarse form of file used for coarsely shaping wood or other material. Typically a hand tool, it consists of a generally tapered rectangular, round, or half-round sectioned bar of case hardened steel with distinct, individually cut teeth.

 A punch tool is a small and narrow piece metal rod featuring a sharp point. ... The other end of the punch tool features a larger and blunter tip. To use a punch tool such as this, a worker presses the sharp end against a workpiece, after which he or she hits the blunt end with a hammer or mallet