Double-Cut File.] [Illustration: Fig.147.Cabinet Wood-Rasp.] [Illustration: Fig.148.

File-Card.] _Files._ Figs.

142-146, are formed with a series of cutting edges or teeth.

These teeth are cut when the metal is soft and cold and then the tool is hardened.

There are in use at least three thousand varieties of files, each of which is adapted to its particular purpose.