Hand-operated coffee and spice grinder that screws onto a mason jar for collection. Features a silver metal grinding mechanism and a natural wood handle for comfortable turning. Simple design for reliable, on-demand grinding. Silver and natural wood finish adds rustic charm. manual coffee bean grinder attachment mounted on a glass Mason jar, likely from brands like Kilner or Henning Lee.It features a stainless steel grinding mechanism with an adjustable setting for grind consistency. The hand crank is typically designed with a wooden handle for ergonomic use while grinding beans.It is specifically designed to fit regular mouth Mason jars, allowing you to grind directly into the storage container.