Features: This 30cm multifunctional roller parallel ruler ensures precisely measurement with its innovative rolling wheel design, eliminating the hassle of traditional rulers for professional architectural drawing task and providing accurate result. Crafted from light weight plastic, it features sturdy construction and versatile functionality, allowing for smooth measurement and easy drawing of parallel lines and curves. Ideal for architect, engineers, student, and artists, it caters to professional and learners who require multifunctional engineering drawing ruler measuring tool for detailed technical drafting project and creative work. Perfect for use in offices, classrooms, or outdoor sketching, this professional rolling parallel ruler measuring tool facilitates efficient measuring and sketching in various environments, from daily commutes to fieldwork. With its compart size and portable design, this multifunctional scale drawing ruler widely used for diverse applications, making it essential drawing tool accessory for enhancing productivity in any setting. Specifications: Component: Plastic Color: Clear Size: Approx. 30.7x6.5cm/12.08x2.55in Weight: Approx. 80g Package Includes: 1Piece Plastic Roller Parallel Ruler note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind before bid. 2.Due to difference between different monitors, the picture may not reflect the actual color