This Maped Technic scale ruler, 30cm long and with 1:20 and 1:100 scales, is a precision instrument suitable for technical drawing, architecture, and engineering, allowing you to convert real-world measurements to different scales for representation in smaller plans and projects. The quality of the French brand Maped guarantees precise and durable markings. This scale ruler is an essential tool for architecture, civil engineering, and technical drawing students who work with detailed plans at specific scales.