Kyocera Advanced Ceramic Slim Adjustable Coffee Mill,  Black Ceramic grinding mechanism Adjustable grind: Tighten or loosen for fine to coarse grinds Rustproof: The advanced ceramic mechanism is non-reactive & will never rust Non-slip base: The anti-slip base ensures stable grinding The glass container is re-usable and dishwasher safe Advanced, non-reactive ceramic burrs that will not affect the taste of coffee beans for the freshest coffee Easy to operate and refill with adjustable dial for grind preference Long-lasting grinding mechanism that will never rust