The Herbivore Grinder is a must-have accessory for any vaporizer. It's an essential tool for ensuring efficient vaporization because it increases the surface area of your materials and leads to better vapor production. This particular 4-Piece Grinder is made from high-quality aluminum and utilizes sharp blades that are capable of grinding your materials to the perfect consistency. It also features a bottom compartment with a pollen screen for collecting your most precious "material". Each grinder includes a scrape tool and felt pouch for storage. Some models include a clear top or a handle for easier turning action.