The Stabila 81S Torpedo Level features a strong cast aluminum T-profile for easy handling and a slender trapezoidal bevelled shape ideal for working in cramped spaces. The die-cast frame has one milled measuring face and protective noses to prevent damage. Additional rare earth magnets are mounted in the milled measuring surface for secure attachment to scaffolding or beams. It includes 2 vials: 1 plumb and 1 horizontal, with an accuracy of 0.5mm/m in the normal position and 0.75mm/m in the overhead position. The Type 81SREM variant boasts rare earth magnets that are five times stronger than standard magnets, making it perfect for applications on steel frame structures, fitting, and welding.