Features: Crafted from high quality aluminum , this folding straight Rulers ensures durability and Precisions, making it essential tool for accurate measurements and geometric drawing . Featuring a center rotation design, the Protractors offers stable and precise Angles measurements, while its anodized surfaces prevents corrosion, ensuring long service use. Ideal for architects, artists, students, and Professional who require reliable measurement tool for their projects. Perfect for use in classrooms, architectural design studios, art workshops, and any environment where precise drawing or measurement is need . Its foldable design makes it easy to carry and store, fitting conveniently into backpacks or toolboxes, making it a Multifunction addition to your measuring tool collection. Specifications: Material: aluminum Size: about 160x25x5mm/6x1x0.2inch Ranges: 15 to 30cm Package Includes: 1xFolding Rulers note: Please allow 1 to 3cm error due to manual measurement, please make sure you do not mind before you bid, Due to the differences between different monitors, the picture may not reflect the actual colorful of the item.