Kapro 985-41-24M 24"  Apollo Magnetic Box Level with Plumb Site Professional-grade box spirit level for determining horizontal and vertical plane Shockproof, solid acrylic vialsone level and two to three plumbresist breakage, provide clear readings, and have a sensitivity of 0.5 mm/m (0.0005"/inch) as certified by VPA 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