BOX LEVEL: Exclusively designed for the professionals at work; this level promises a lifetime of unparalleled performance. ACCURATE READINGS: Ergonomic box level with reinforced aerospace aluminum alloy frame promises excellent durability. It has easy read vials that provide accurate readings every time. EASY READABILITY: The Johnson level has patented Glo-View technology that maximizes vial readability; making it ideal for professionals working in dim-lit or dark areas. WIDE WINDOW: The box level is designed for ultimate user convenience. It has a domed level vial that offers 320° visibility for ease at the job site. SECURE GRIP: The 48 in. Heavy-Duty Aluminum Box Level has a rubberized handgrip that provides a comfortable and secure grip throughout the task.