Irwin® offers a powerful line-up of levels and squares tools packed with features that stand up to the rugged conditions of the jobsite. we dedicated our development efforts to understanding exactly what professionals expect and need from these tools, and we delivered that accuracy and performance, and much more. our new comprehensive line of IRWIN levels includes box beam levels, I-beam levels, torpedo levels, and multiple specialty levels for a broad range of users' needs. we also offer a full range of squares and utility levels to provide our customers with complete category coverage. Irwin® Box Beam Level, Heavy Duty Magnetic Standard, Series: 2550, 0.029 deg Accuracy, 72 in Length, 2-1/2 in Width, 2-1/2 in Height, 4 Vials, Vial Positions: (1) Level/(3) Plumb, Acrylic Vial, Center/Bubble Vial, Aluminum, Blue/Yellow