A folding agitator is a type of paddle agitator, with the difference that its blades can be folded in the axial direction, thus allowing this type of agitator to be used for containers with a narrow neck (eurocubes, chemical reactors, barrels).
When the shaft rotates, the centrifugal force opens the blades to the working position, when stopped, the blades fold, which allows you to remove the agitator for cleaning or maintenance.