As the dominant market leader in levels, squares, and marking products, Empire Level is committed to delivering innovative solutions designed to satisfy the needs of the modern jobsite. The 500 Series I-Beam levels offer superior performance in all key areas of user needs and functionality. Exclusive high contrast vials provide for easier viewing in all lighting conditions and feature single solid acrylic shock resistant vials for dependable durability. An all-metal frame provides superior durability and protects long-term accuracy to 0.0005 In. per In. in all working positions. Each level is outfitted with high impact resistant end caps to withstand the toughest jobsite conditions. For added utility, the 500 Series features a top read window for a clear overhead view and integrated molded grip zones for improved portability. Magnetic models feature a high strength continuous magnetic edge which provides users with maximum holding power when measuring door frames, steel studs, ferrous pipe, and other common metalworking applications. Made in the USA.