4 Piece Herb Grinder
4 piece herb grinder is a three-chambered style herb grinder. It consists of a lid, grinding chamber, collection chamber, and kief chamber. In this herb grinder bottom of the grinding chamber consists of holes for the ground herbs to fall through into the collection chamber. Unlike 3 piece chamber, its collection chamber has a small mesh screen instead of a solid bottom chamber. Under the collection chamber is the final piece: the kief chamber. This grinder is called three pieces because the lid, grinding chamber, collection chamber, and kief chamber equal to three pieces.