This amazing little grinder is made out of American milled aircraft grade aluminum allowing it to outlast the competition and survive daily usage. Its centering edges on the outer edges pushes the dry herb blend to the center for constant movement as the opposing bi directional diamond teeth work to get you the perfect consistency for the desired texture. The 4pc Space Case Scout Grinder Container Small Magnet 38mm is made up of four separate chambers and employs Nylon O-Rings from smooth and precision rotation, making gliding through your herbs a breeze. The powerful Neodymium rare earth magnets provide superior closure and the premium, high grade T-316 Stainless Steel Pollen Screen and scraper collects all your goodies. At just 2 inches wide and 1.63 inches tall, the 4pc Space Case Scout Grinder Container Small Magnet 38mm is the perfect portable accessory for incredible sessions.