Northern Industrial Tools 50:1 Grease Pump Kit for 35-66-Lb. Drums Double action grease pump is easy to operate and maintain Drum cover helps keep dust and impurities from contaminating the grease Drum cover also keeps the pump in a vertical position for optimum operation The follower plate, indispensable when using heavy grease, is pilled toward the bottom of the drum by the vacuum by the pump The drum trolley allows the system to be moved around the workshop with ease, giving increased efficiency