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, 0, 5mm/M). Amplified Rare Earth Magnets: Maximum holding power. 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 storage. 48-Inch Redstick Magnetic Box Beam Level – MLBXM48 Lifetime Limited Factory Warranty Material: Aluminum Level Type: Box Level Number of Vials: 3 Material: Aluminum Level Type: Box Level Number of Vials: 3.