bastard file

English

A half-round file.

Three flat files (from left to right: smooth, second cut, bastard). The bastard file is coarser than the other two depicted, but not as coarse as a rough file.

Noun

bastard file (plural bastard files)

1. A half-round file or rasp (being a flat file on one side, and a round file on the other); typically having coarse teeth.
2. A file of intermediate cut, neither very coarse nor very fine.

See also

• adj. bastard in the sense of "hybrid" or "impure".