Lortone Tumbler – Model QT12 Delivering outstanding performance and with a overall capacity of 12 lbs., this single-barrel tumbler can accommodate up to 6 lbs. of steel shot for effective, efficient results. Keep in mind that the workpieces added will increase the weight, up to a max. of 12 lbs. Designed for continuous shop operation, the Lortone QT12 tumbler features a 10-sided barrel, a leak-proof closure, an overload-protected motor and a rugged steel frame.