The Lortone 45C Rotary Rock Tumbler features a larger capacity, 10-sided barrel, a popular size for tumbling stone, brass cartridges, castings and more. It's easy to use, even for a beginner, but produces beautiful results. The molded-rubber barrel has a 4-pound capacity, and the steel body is strong and stable. Lortone quality is backed by a one-year warranty from the manufacturer.