To use a tank or drum on the processor (without the JOBO Lift attached) a magnet must be mounted on its bottom. You must have a cog installed on a tank or drum lid to allow coupling with the accessory JOBO Lift or Autolab processor. Some tanks and drums come with a magnet or cog already installed, some do not. At least one of these mounting systems must be present to use a tank or drum on the processor.