This Milwaukee level masters set features magnetic levels made with amplified, rare earth magnets for maximum holding power. It includes three box levels measuring 24, 48, and 78 inches: a block torpedo: and a 48-inch storage bag. They have an ALL-METAL BACKBONE frame with accuracy to 0.029 degrees, and SHARPSITE technology vials with best-in-class readability for plumb, level, 30-degree, and 45-degree applications.