The hachoir is a knife with a semicircular blade and a straight handle attached in the top center of the blade.
It is used to finely chop small quantities of herbs, which are placed in the corresponding concave wooden bowl. Thus, one can either move the knife back and forth and cut the herbs or chop up and down with the blade perpendicular to the bottom. In the meantime, the bowl should be turned from time to time. [MOT]