Stanley fat max i beam level has solid block vials to provide an accuracy of 10mmm in eight orientations plus every fat max level comes with a lifetime accuracy warranty it is 2 x stronger than other stanley levels thanks to its unique reinforced box beam construction lightweight body and rule scale for ease of marking out also a handgrip make handling easy and the precision engineered dual machined levelling surfaces ensure maximum accuracy the 3 vials are magnified for improved all round visib