Designed to fit in your pocket, our ONGROK 2-piece grinder is crafted out of solid, aircraft-grade aluminum, making it almost indestructible. We use a neodymium magnet to keep the lid in place. The exterior is a flake resistant finish. The interior has 26 triangular shaped teeth to provide a medium-to-fine grind, every time. Features UNIQUE MAGNETIC LOCKING FUNCTION | The neodymium magnet keeps the lid securely in place so it's easy to open and access your herbs. DISCREET AND SLEEK | Designed with discretion in mind, the pocket-sized, sleek design of our 2-piece grinder won't look out of place in a home or professional office environment. 100% PERFORMANCE GUARANTEE | We guarantee the performance of all of our products. If you are ever dissatisfied, reach out to us and we'll be certain to make things right!