Super accurate. Solid-block acrylic vials provide the best-in-class accuracy of 0.5mm/m in eight orientations. Plus every FatMax XL level comes with a lifetime accuracy warranty. 5 x stronger than other Stanley levels thanks to its unique reinforced box-beam construction. Light, tough and easy to handle. Lightweight aluminium body and sturdy bi-material handgrips make handling easy. Precision engineered. Dual-machined levelling surfaces for maximum accuracy. Magnified centre vial. Centre vial is 20% larger than standard, making it clearer to read. Shock absorbing ends protect the level even if its dropped. 10-year warranty. Reviews 5/5 I regularly use this level for all aspects of landscaping and builder... it has been dropped, knocked about to level paving with a rubber mallet and is still 100% accurate !! Wouldn't use anything else now, and believe me, I've killed many levels! 5/5 absolutely fab, have the 4ft and 6ft levels never had anything so strong and durable, would recommend to every1 Top Tip: invest in all sizes, you will not be let down 5/5 This is the best level I have ever owned. Simply. I have the 1200mm one and use it everyday for everything you can imagine, it's strong, accurate and reliable. It has had some stick in the 2 years i have had it so far, also a colleague has let it fall off a 3 storey scaffold and it has survived with out being a millimetre out of level. I can only say good things about this product and would absolutely recommend without and hesitation to anyone! 5/5 Great level,strong but light which makes it handy when holding at different heights.Nice and comfortable grip.And you know its spot on for level. 5/5 nice solid build rubber gripped handles are very usefull on the 6ft version,looks and feels like it will last years.