Grinders come in several parts and are designed to crush and splice dry herbs and spices into smaller components for easier consumption and a better burn in bowls, rolling papers, and more. Through a twisting mechanism, the two interlocking teeth will cut the dry herb, and it will fall down the holes into the next chamber of the grinder. Then, simply open the grinder by twisting apart the second storage compartment, and you have finely ground legal dry herbs!