The Kilner fermentation pestle is an essential tool for preparing ingredients to make fermented foods like sauerkraut, kimchi, and much more. Made from beech wood, the fermentation pestle features a textured head that makes it easier to crush the ingredients and reduces air pockets in the jar, allowing the flavors typical of fermented foods to be released more effectively. The pestle is suitable for Kilner fermentation sets with a capacity of 3 and 5 liters, but can also be used with a variety of Kilner wide-mouth jars.