The 55mm Herbivore Grinder is a 2-piece metal herb grinder that ensures better vaporization. The second most discreet herb grinder from Herbivore is easy to conceal and put to use in public. The 55mm Herbivore 2-Piece Grinder is made of high-grade aluminum with sharp, durable teeth that break down dry herb to the ideal consistency for vaporization. By grinding down dry herb, the Herbivore grinder gives heat more surface area to cover, making for even and thorough vaporization. A felt pouch is included for traveling and storage.