The Stabila Magnetic Pocket Level Pro with Holster (11901) is a professional mini sized level that 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. This Pocket Level is ideal for leveling small interior and exterior trim pieces and objects such as exit signs, wall lights, thermostats, appliances, emergency signs and alarm triggers.