The CMB Trimmer is a four-head rotary machine capable of handling all standard DWI can sizes. Cans are fed from the Bodymakers interconnecting conveyor into a vacuum infeed turret and loaded onto quick-change cartridge style tooling. A single ejector ring conforms to the untrimmed edge, and the can is held stationary whilst the internal penetrating disc moves eccentrically against the outer knife, accurately trimming the can in one revolution.