The Milwaukee REDSTICK box levels provide industry-leading performance with best-in-class vial readability and frame durability. 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. The Milwaukee REDSTICK box levels are backed by a lifetime accuracy guarantee and a Limited Lifetime Warranty.