[3] The term burin refers to a tool used by engravers that has a thin, pointed blade and is used to etch or cut.
[4] The burin consists of a rounded handle shaped like a mushroom, and a tempered steel shaft coming from the handle at an angle and ending in a very sharp cutting face, creating a "V"-shaped groove in a printing plate of soft metal, classically copper.
A tint burin has a square face with teeth, to create many fine, closely spaced lines.
[6] A flat burin has a rectangular face, and is used for cutting away large portions of material at a time.
The 16th-century Dutch engraver Hendrik Goltzius found his unusually malformed hand was well suited for cradling and guiding a burin.