The M-1 Case Tumbler cleans and polishes large quantities of cases. Coupled with Hornadys Tumbling Media, the cyclonic and vibratory action of the Tumbler cleans brass to a shine. The included sifter separates the polished brass from the media. Running time varies based on the condition of the cases and desired cleanliness. Holds up to (400) .38 Special cases, (180) 30-06 cases, or the equivalent of other like-sized cases.