This is considered a very basic model for rock tumblers. One 3-pound capacity barrel and a drive motor. Has a very good leak-proof lid-retainer system. Most people start with a single-3 Lb. or a double-3 Lb. rotary rock tumbler. Great for small loads, and while you are learning--it is also very economical to run. It will achieve the same polish quality as the others. The Lortone name is considered the gold standard for rotary machines. We have two units left. Note: this is a brand new rock tumbler which carries the full factory warranty!