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 herbs 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 herbs 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. Note: This model includes a handle for easier turning action.