These Magnetic I-Beam Heavy-Duty Series levels are the go-to guys in the Swanson lineup. Their heavy-duty, high-grade aluminum frames are strong and light, featuring oversized vial windows for better visibility that are locked into place with machined screws to maximize durability. Resilient, shock-absorbing end caps protect the frame and vials from the worst impacts. A heavy-duty strip magnet makes this level perfect for welding, plumbing, metalworking, and steel fabrication. This level series is a catch-all for any DIY home improvement project.