Rock Tumbling is a hobby that your whole family can enjoy! Tumbling is a simple way to polish agates and other gem stones. If you are truly interested in producing flawless gems through the tumbling process, this Model MP-1 Rock Tumbler with Accessory Kit is ideal. 2 pound capacity tumbler comes with one rubber barrel and 120V continuous duty motor (overlaod protected). For the beginner. Does a quality job of polishing stones. Besides tumbler, kit contains polishing rock, 4 grades of polishing abrasives, jewelry findings, and instruction manual.