extra-rigid aluminum profile with reinforcing ribs, high stability and a secure grip when working, extra-strong rare-earth magnet system for adhesion to metal components, hands-free aligning and adjusting posts and supports, two vertical levels for quick reading in any position, end caps with slip stoppers, the spirit level stays in place when marking, shock-absorbing end caps, the two-component material mix protects the profile from impacts, removable end caps, exact positioning and marking right into corners, easy to clean thanks to the electrostatic powder coating, with two precisely milled measuring surfaces (from 183 cm coated), precise measurement in all positions, STABILA built-in technology ensures long-term precision, measurement accuracy in normal position ± 0.5 mmm, in reverse position ± 0.75 mmm, particularly suitable for measuring tasks in metal construction ? the user always has free hands when aligning and adjusting components