This Maped Technic scale ruler, 30cm long and with 1:20 and 1:125 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 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 regularly work with plans in different specific proportions.