Kapro 130-62-48 Project I-Beam Level, 48-Inch I-beam spirit level for determining horizontal and vertical plane as well as incline Injection-molded acrylic vialsone level, one plumb, and one 45 inclineresist breakage and have a sensitivity of 0.001"/inch V-shaped groove in the base provides reliable seating when leveling round items Sculpted handgrip for portability and ease of use Aluminum body for light weight and corrosion resistance with ABS end caps that help absorb impacts