1Tin Plated Cast Iron: This hand grinder is made from cast iron with a tin plated surface, therefore, it shouldn't be washed directly with water to prevent rust. Clean with a damp cloth or brush, dry the parts and oil the surface to prevent rusting. The surface of cast iron products may be a little rough. 2Convenient and Labor Saving: Equipped with a large hopper, this grinder is ideal for grinding corn or other grains into a rough mix for animal feed. Its manual crank operation is energy saving and convenient, making grinding an effortless task. 3Stable and Secure Fixation: With its easy to use clamp, you can firmly fix this grinder on a tabletop less than 4cm in thickness. It's versatile and can be used in multiple scenarios with great stability. 4Broad Applicability: This grain mill is suitable for grinding a variety of items such as corn, barley, seeds, coffee beans, rice, chili, soybeans, chickpeas, wheat berries, pepper, dry beans, and more. It's ideal for home brewing and other grinding needs. 5Easy Usage: Once assembled, fix the clamp on the edge of the worktable, pour the material into the hopper, and start grinding by turning the handle. For new grinders, it's recommended to grind some grains several times to remove any metal shards or paint chips.