The Stanley FatMax Pro Level has solid-block acrylic vials to provide an accuracy of 05mmm in eight orientations In addition every FatMax Pro level comes with a lifetime accuracy warranty The level is 5x stronger than other Stanley levels thanks to its unique reinforced box-beam construction The lightweight aluminium body and sturdy bi-material handgrips make handling easy and the precision engineered dual-machined levelling surfaces ensure maximum accuracy The vials are magnified by 20 for improved all round visibility With shock absorbing end caps protect the level even if it is dropped