Aluminum rectangular profile with reinforcement ribs ? High stability and a secure grip when working, extra-strong rare-earth magnet system for adhesion to metallic components, free hands when aligning and adjusting posts and supports (up to 5 times stronger than conventional ferrite magnets), integrated slip stoppers ensure a firm grip Fit when marking, STABILA quality vials for optimal readability, highly transparent, durable acrylic glass with precisely ground inner contours and fluorescent vial liquid, STABILA built-in technology ensures long-term precision, measuring accuracy in normal position ± 0.5 mmm, in reverse position ± 0.75 mmm, with two measuring surfaces, precise Measuring in all positions, plastic end caps protect the profile from impacts, easy to clean thanks to the electrostatic powder coating, is particularly suitable for measuring tasks in metal and drywall construction