Johnson 48" Aluminum Box Beam Level is a professional-grade tool designed for accuracy and durability. It features three vials that read plumb, plumb & level, making it ideal for a variety of tasks. The Surround View Vials reflect ambient light for easy reading, even in low light conditions. The solid block acrylic vials won't fog, leak, or break, ensuring long-lasting performance. The impact-resistant ABS end caps protect the level from damage when dropped, while the ABS hand grips provide comfort during use. With an accuracy of up to .029 degree 0.5 mm/m in the standard position, and .044 degree 0.750mm/m in the inverted position, this level is perfect for even the most demanding jobs.