Extra-stiff aluminium profile with reinforcing ribs for high stability and safe grip when working. Extra-strong rare earth magnet system allows for adhesion to metal construction elements, keeping hands free when aligning and adjusting posts and beams. Two vertical spirit levels enable quick reading in any position. End caps with slip stopper ensure a firm fit of the spirit level when marking out. Shock-absorbing end caps made from a two-component material mix protect the profile during impacts. Removable end caps allow for precise positioning and marking right into corners. The electrostatic powder coating makes it easy to clean. The spirit level features two precisely plane-milled measuring surfaces that prevent discolouration of surfaces, such as exposed brickwork. Stabila built-in technology guarantees long-term precision, with measuring accuracy in normal position of ± 0.5 mm/m and in folding position of ± 0.75 mm/m. Equipment includes one horizontal bubble, two vertical bubbles, two milled measuring surfaces, and a rare earth magnet system.