handy, robust die-cast aluminum profile with a narrow and slanted shape, strong ferrite magnet system for attaching the spirit level to metal components, free hands when aligning and adjusting posts and supports, easy cleaning, dirt can be removed again thanks to the electrostatic powder coating, with a precisely milled measuring surface, STABILA installation technology ensures long-term precision, measuring accuracy in normal position ± 0.5 mm, in reverse position ± 0.75 mm, the adhesive force of the ferrite magnets is particularly required in metal construction ? the user always has free hands when aligning and adjusting components