The Lot-o-Tumbler is clearly one of the best vibratory tumblers on the market. This Twin barrel 9lb total capacity tumbler lets you double your capacity. Its soft rubber barrels also makes it one of the quietest vibratory tumblers out there. Mounting is key with these tumblers so be sure to read the detailed mounting instructions before you purchase. It is advised that both barrels be full when running the tumbler. See a Lot-o-Tumbler in action here!