Cole Mason Precision Forest Capstan Peppermill 405mm has the ability to adjust the grind from fine to coarse by tightening or loosening the knob on the lid. The Forest Capstan mills feature a hardened carbon steel mechanism for pepper and diamond sharp ceramic mechanism for salt and come with a lifetime guarantee. The Cole & Mason Precision mechanism does not crush peppercorns but strips them to release the maximum amount of flavour with each turn. To learn more about our mechanisms and which one best suits your seasoning needs click here. We recommend using high quality peppercorns and coarse rock salt in all our mills.