Klein Tools' Box Beam Levels are precision-engineered with a robust aluminum frame, delivering exceptional accuracy in leveling and plumbing. Combining high-quality construction with advanced machining, these levels provide reliable, precise results, making them an essential tool for professionals demanding perfect layout and alignment. For more than 160 years, Klein Tools has manufactured premium-quality, professional-grade hand tools that deliver the performance, durability and precision needed to get the job done right. Our family of engineers, workers and craftsman continue to put six generations of expertise into every tool we create by using only the highest quality materials, superior workmanship, and keeping manufacturing as close to home as we can. Klein isn't just the name of our company, it's also our family name. And since we're an American company that's family-owned and family-run, you know you can count on us to be here tomorrow. Klein Tools doesn't just make great products, we make great products that stand up to the demands of the professionals who use them every day ... Since 1857. EASY-TO-READ VIALS: Large, high-visibility vials provide accurate readings at level and 90 degrees THREE VIALS: Vial accuracy ensures precision at 0.029 degrees (0.5mm/m) TOP VIEW VIAL WINDOW: Enables readability from multiple angles, enhancing usability BRIGHT ORANGE BODY: Easy-to-spot orange body ensures visibility on conduit and at the jobsite, promoting efficiency V-GROOVE DESIGN: Fits the contour of round surfaces like conduit and pipe more securely REMOVABLE RUBBER END CAPS: Protect against accidental impacts with rubber end caps that can be removed for better performance in tighter spaces SOLID ALUMINUM CONSTRUCTION: 48-Inch level built from aluminum, ensuring durability on the most demanding job sites