Many people like to grow their own herbs. They seem to taste better than those that are bought from a store. However, these gardeners need to grind the herb into little pieces. In order to do that, they need to purchase an herb grinder. These devices are round. The top part comes off and the bottom part has sharp teeth-like metal pieces. These are used to grind the herbs. More modern grinders have more than two parts.
This is so that the grounded herbs fall into a little container without having to fall onto the countertop. Other smaller items can be ground using an herb grinder. The first herb grinder was made in the early 1900s by a manufacturer that began creating kitchen devices.