Features and Benefits:?ALL-METAL BACKBONE? - strongest, most durable frame. reinforced vial retention?SHARPSITE? VIAL technology - best readability, impact protected?Guaranteed lifetime accuracy - accurate to .029-degrees (.0005 in./in., 0, 5 mm/m)?High contrast vial system is easy to clean and optimizes visibility.?High density, removable end-caps protect frame and provide access in tight spaces?Wide, durable handles for comfort and portability?Precision milled measuring surface guarantees accuracy in all working positions?Overmolded, non-slip grips stick to the wall and prevent sliding?Durable, all-metal hang hole for storageThe Milwaukee REDSTICK? box levels provide industry-leading performance with best-in-class vial readability, frame durability, and magnet strength. The ALL-METAL BACKBONE? provides the strongest, most durable frame ensuring long-life accuracy. SHARPSITE? Vial technology provides best-in-class readability with a magnified bubble and high-visibility vial spirit. Amplified rare earth magnets maximize holding power. The Milwaukee REDSTICK? box levels are backed by a lifetime accuracy guarantee and a Limited Lifetime Warranty.