The Hornady M-1 Case Tumbler adds to the quality of your ammunition by using the M-1 Case Tumbler to clean and polish large quantities of cases quickly and efficiently. Coupled with Hornady tumbling Media the cyclonic and vibratory action of the Tumbler cleans brass to a brillant shine. Use the included sifter to seperate the polished brass from the media. Running time varies based on the condition of the cases and degree of cleanliness desired. Holds up to 400 .38 Special cases 180 30-06 cases, or the equivalent of other like sizes.