The London Salt mill is fitted with an ultra sharp ceramic mechanism which does not corrode with time. Easily adjust the grind from fine to coarse by turning the knob on the top of the mill To clean, wipe with a damp cloth and use a clean cloth to dry. We recommend you do not use any cleaning products as this can affect the finish of the product. Do not immerse in water or place in a dishwasher. All Cole & Mason salt and pepper mills are covered by a lifetime mechanism guarantee. In the unlikely event you are experiencing any issues with the mechanism in your mill, please contact the Cole & Mason customer service team and they will be happy to assist you. Made from high grade of beech wood and inspired by Art Deco and industrial British architecture, the new London mill both honours our heritage and looks to the future with a classic, yet contemporary aesthetic which will prove a stylish addition to both traditional as well as modern kitchens.