These I-Beam Levels are the ‘go to guys’ in the Swanson line. Heavy-duty, high-grade aluminum frames are strong and light, featuring oversized vial windows that are locked in place with machined screws so they don’t fail upon impact. Super-resilient, shock absorbing end caps protect the frame and vials from the worst impacts. A heavy-duty strip magnet makes this level perfect for welders, plumbers, metal workers and steel fabrications.