Stanley 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. The 3 vials are magnified for improved all round visibility with shock absorbing end caps protect the level even if it's dropped. Ref: UTTK10228