Kapro 781-PM-72 Genesis Magnetic Box Level with Plumb Site, 72-Inch Box-style spirit level for determining horizontal and vertical plane Shockproof, solid acrylic vialsone level and two plumbresist breakage, provide clear readings, and have a sensitivity to 0.5 mm/m (0.0005"/inch) as certified by VPA for precise leveling Level vial and dual-view plumb vial can be read from the side and the top Magnetic base adheres to metal surfaces Aluminum body for light weight and corrosion resistance, and a milled leveling surface for accuracy