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 A-R6 Rock Tumbler is ideal. Deluxe 9 pound capacity rubber barrel will accomodate larger size rocks. Ideal for brass polishing. Large continuous duty fan-cooled motor. Overload protected.