【HIGH-PRECISION GRINDING CERAMIC CORE】: The manual coffee grinder uses a high-precision ceramic bean grinding core, which provides a stable grinding effect, and it can be ground coarsely or finely according to personal preferences. The ceramic grinding core has anti-rust properties, which can ensure the purity and taste of the coffee. Keep the temperature low during use to avoid loss of flavor from the coffee beans due to heat. 【Ergonomic Design】: The manual coffee grinder has a lightweight ergonomic design with a stylish finish and an extended rocker design that is very comfortable to use. The extended rocker is more relaxing and labor-saving, and the coffee grinder grinds by the principle of leverage, allowing you to finely grind the coarseness and fineness you want without using much force. This precision and ergonomic design make it an option for coffee lovers who value efficiency and consistency.