High-quality telescopic system for extending the measuring surface. The level can be flexibly extended to the required length. The marking edge along the entire length allows for measuring and marking in one operation, even when extended. A printed metric scale is used to determine internal dimensions and clear dimensions. The LOCK system for fixing the set length prevents unintentional adjustment of the level. Integrated slip stoppers ensure a secure fit when marking, preventing the level from slipping. The high-quality extension mechanism guarantees high measurement accuracy: in normal position (closed ± 0.5 mm/m and extended ± 1.0 mm/m) and in flip position (closed ± 0.75 mm/m and extended ± 1.0 mm/m). Plastic end caps protect the profile from impacts. Features: 1 horizontal bubble level, 1 vertical bubble level, 1 measuring surface, telescopic system, 1 continuous marking edge, 1 printed metric scale.