Every year, construction rework costs the industry millions in time and materials, which underlines the importance of getting the job done right the first time. In many cases constructing the right results is a matter of accuracy. For instance, if a mason's level measuring the trueness of 100ft. wall is off just a fraction of an inch, the inaccuracy will be exponential and significant in the end. Empire realized how important accuracy is, and that's why they are the industry leader in accurate levels. No other manufactured uses ACM™, and can guarantee vials accurate within 0.0005''. When accuracy matters, Empire is the obvious choice.