smooth rectangular aluminum profile, two vertical spirit levels enable quick reading in any position, coated measuring surface protects sensitive surfaces, easy to clean thanks to smooth side surfaces and electrostatic powder coating, plastic end caps protect the profile from impacts, STABILA installation technology ensures long-term precision ? Measuring accuracy in the normal position ± 0.5 mm, in the reverse position ± 1.0 mm, particularly suitable for measuring tasks in the areas of carpentry and joinery work, electrical installations, tiling work and heating construction, ideal measuring tool for do-it-yourselfers