ERGO crafts precision herbal grinders made of premium materials to give you an easier and more enjoyable smoking experience! With a lid that features an ergonomic grip to make it easier to use as well as a strong magnetic closure for the lid, ERGO makes your grinds easier and more functional. Made of premium aircraft grade aluminum to give you a high-quality grind every time, these grinders will resist wear, tear, and threading with each use. With a lifetime manufacturers warranty and bright, vibrant colors on the anodized aluminum lids, these grinders will quickly become your new favorite!