ERGO offers you a masterfully crafted precision herbal grinder made of only the highest quality materials to give you an easier and more enjoyable smoking experience every time! With a lid that features an ergonomic design to make it easier to grip and use as well as a strong magnet to make closing these grinders a breeze, ERGO has thought of everything. Made of aircraft grade aluminum to give you a premium grind every time that will last through the ages and resist wear and tear, these grinders will become your new best friend. These style of 4-piece grinder offer you a removable screen that can be easily replaced or cleaned, making it more versatile than other fixed screen grinders. With a lifetime manufacturers warranty and bright, vibrant colors on the anodized aluminum lids, these grinders are a notch above the rest!