Aluminum rectangular profile with reinforcing ribs ? high stability and secure grip when working, extra strong rare earth magnet system for adhesion to metallic construction elements, free hands when aligning and adjusting posts and beams (up to 5 times stronger than common ferrite magnets), integrated slip stoppers ensure a firm fit when marking out, STABILA quality vials for optimum readability, highly transparent, resistant acrylic glass with precisely ground inner contours and fluorescent vial liquid, STABILA mounting technology ensures long-term precision, measuring accuracy in normal position ± 0.5 mmm, in folding position ± 0.75 mmm, with two measuring surfaces, precise measuring in all positions, plastic end caps protect the profile during impact, easy to clean thanks to electrostatic powder coating, is particularly suitable for measuring tasks in metal and drywall construction