The Milwaukee 36" REDSTICK Box Level (MLBX36) provides 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.