Durable, accurate and ergonomic, this box level is a jobsite essential. It's reinforced aerospace aluminum alloy frame provides the durability needed on even the roughest jobsite, while the magnified domed vials provide 320 deg visibility and feature Johnson's patented Glo-View® technology, so they glow in the dark to maximize vial readability. This box level features strong rare earth magnets that hold the level securely in place on ferrous surfaces.