The vacuum cleaner is versatile, whether for removing coarse dirt and liquids, for suctioning machines and systems, or for cleaning vehicle interiors. It is equipped with thoughtful details for storing the completely newly developed accessories. Among other features, its head has been designed to be so flat that a toolbox can be easily placed on it and secured thanks to the fastening options. Additionally, the NT 40/1 Ap L impresses with its very simple operation. All important functions are selected and adjusted directly via a central rotary switch.