Stanley 43-648 48-Inch FatMax Xtreme Box Beam Level

Durable box beam construction is up to 5x stronger than other Stanley levels. Block vials provide accuracy of 0.0005 in/in (0.5mm/m) . Magnified center vial for improved visibility . Machined leveling surfaces improves accuracy Amazon.com The Stanley 48-Inch FatMax Xtreme Box Beam Level features a durable box-beam construction that is up to 5 times stronger than other Stanley levels. The center vial is magnified for improved visibility, and the block vials provide an accuracy of 0.0005 in/in (0.5mm/m) while machined leveling surfaces improve accuracy. This 48-inch level is backed by a lifetime accuracy warranty. The Stanley 48-Inch FatMax Xtreme Box Beam Level features a durable box-beam construction that is up to 5 times stronger than other Stanley levels. The center vial is magnified for improved visibility, and the block vials provide an accuracy of 0.0005 in/in (0.5mm/m) while machined leveling surfaces improve accuracy. This 48-inch level is backed by a lifetime accuracy warranty.