The STANLEY FATMAX XTREME Box Beam Level is designed for durability and accuracy, providing the performance needed for every job. It features a patented continuous edge for uninterrupted lines, and fine milled primary and secondary edges for precise measurements (0.5mm/m and 0.8mm/m respectively). The vial technology is secured to protect against drop damage, and the 90% larger plumb vial offers improved visibility. Shock-absorbing, rubber-molded endcaps protect against drops and have raised anti-slip surface protectors to prevent slipping and surface marking. The removable endcaps facilitate easier and more accurate 90-degree markings and corner lines. Strategically placed finger grab rails and wrap-around hand grips enhance ergonomic design and one-handed use.