Herb grinders are tools used to break down herbs and spices into smaller, more manageable pieces. They typically consist of two or more interlocking parts with sharp teeth that shred the material when twisted. This process enhances the flavor and aroma of the herbs, making them easier to use in cooking or for other purposes. Available in various materials like metal, wood, and plastic, herb grinders come in different sizes and designs. Some models include a pollen catcher, which collects fine particles that can be used later. Using a grinder can improve the efficiency of preparing herbs for culinary or medicinal uses.