Abstract: A device for executing a number of actions, such as driving in nails, on a planar section, for example a wall element, for fixing a covering panel or the like on the planar section. A carriage is displaceable longitudinally over the planar section. A number of the action device are mounted on one side of a carriage and are displaceable individually transversely of the planar section. A number of the action devices are mounted on the other side of the carriage and are displaceable together with one another transversely of the planar section.