FatMax® I-Beam Level 3 Vial 180cmStanley FatMax I Beam Level has solid block vials to provide an accuracy of 1. 0mm m in eight orientations. Plus every FatMax 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.