The STANLEY FATMAX XTREME Box Beam Level is designed for durability and accuracy, providing the performance you need for every job. It features a patented continuous edge for uninterrupted line drawing or scribing along its full length. The fine milled primary edge offers 0.5mm/m accuracy, with a secondary edge accuracy of 0.8mm/m. Fully secured vial technology protects vials against drop damage, and the 90% larger plumb vial offers better visibility for the bubble. Shock-absorbing endcaps are rubber molded to protect the level from drop damage and include raised anti-slip surface protectors to prevent slipping and surface marking. The endcaps are removable, facilitating easier and more accurate 90-degree markings and corner lines. Strategically placed finger grab rails and wrap-around hand grips enhance one-handed use and ergonomic design.