Extremely robust, torsionally rigid aluminum R-profile. Extra-wide measuring surface for exceptional stability, preventing tipping during measurement. Three guiding edges ensure precise marking along the entire profile length. The continuous handle with finger groove provides excellent grip during measuring and transport. Coated measuring surfaces protect sensitive surfaces. The continuous web over the horizontal bubble level further stabilizes the profile. End caps with slip stoppers ensure a secure fit of the level during marking. Shock-absorbing end caps made from a two-component material mix protect the profile from impacts. Removable end caps allow for precise positioning and marking even in corners. The R-profile shape facilitates easy removal of building materials. Easy to clean. STABILA installation technology ensures long-term precision and measurement accuracy in both normal and inverted positions of 0.5 mm. Features: horizontal bubble level, vertical bubble levels, coated measuring surfaces.