The fishhook file is an aluminum rod with a fine ceramic and diamond coating designed for sharpening fish-hooks. It is included on some older Wenger models designed for fishermen. The file has a groove on one side to sharpen the points of the fish hooks. The file is mounted in a metal housing with a white primer-like finish that serves as the pivoting attachment method for the tool. The file is also available with a fly-tying notch. The sharpener itself is made of a black or light blue ceramic material.
The tool is no longer available.
- The diamond impregnated ceramic file material is either light blue or black in color. It is not known if there is any functional difference between the two materials.
- The fly-tying notch was only included on some files, depending on the knife model that contained the file.
- The fly-tying notch was sometimes cut before the ceramic coating was applied, and sometimes it was cut afterwards, showing the bare metal (see image below).