This professional mini sized level can always be carried with you. Its strong aluminum housing and the two V grooved measuring surfaces, with extra strong rare earth magnets form a 90° angle. This makes aligning and levelling on all steel structures especially rounded surfaces an easy task. Just think about all of the small interior and exterior trim pieces and objects that need to be positioned properly before fastening them down. Exit signs, wall lights, thermostats, appliances, emergency signs and alarm triggers etc.