A horse tooth file is shaped like a horse’s tooth. The function of a horse’s tooth is to cut food and grind objects. If you look carefully at a horse’s teeth, you will find that except for the front teeth of the horse, the teeth at the back are basically in the same position. A straight line, flat and long teeth, which can cut food well, and can easily grind food with repeated friction. The shape of the horse tooth file is very similar to the shape of this horse tooth, but it is made of metal.

The ancients may have invented this file based on the shape of horse teeth, so it is called a horse tooth file. Nowadays, horse teeth files are mainly used for shaping.