Kapro 985-41-24 24" Apollo 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 0.0005"/inch (0.5 mm/m) as certified by VPA Level vial and dual-view plumb vial can be read from the side and the top End caps absorb shock from impacts and an ergonomic, non-slip handle provides portability and ease of use Aluminum body for light weight, durability, and corrosion resistance