Adjust the coarseness and fineness of your milling using the adjusting screw. Cast iron with sanitary double tin plating to resist stains and corrosion Compliant with international regulations. High performance discs are made of anti erosion white iron for maximum durability and performance on all types of grain. Use it for home brewing, corn, barley, grains, Coffee, cheese, vegetables, seeds, nuts, coconut, spices, dried beans, cooked meats, etc. The clamp is easily adjustable to most tables and boards 1/2 to 2 inch thick. Comes with a protective non slip rubber, protects your surfaces and prevents the grain grinder from slipping in heavy work.