Johnson Level packs a load of features into their "Big J" Pro Box Levels. They are even backed with a lifetime guarantee for maximum accuracy. Johnson has maximized the visibility of this product with their patented Glo-View® technology. Glo-View® recharges the vial using surrounding light sources. This process provides easy-to-read vials, even in low-light environments. They design these vials with a dome shape, providing a 320° view. Johnson builds their "Big J" Pro Box Levels from a reinforced aerospace aluminum alloy. This material is both lightweight and extremely durable. They then equip them with large, comfortable rubberized hand grips. Johnson then finishes them off with removal GripTight™; end caps for maximum strength. Choose from lengths of 24, 48, or 59 inches below.