Rolling Ruler with Roller for Parallel Line Drawing - Parallel line drawing with a roller: The rolling ruler uses a wheel to create parallel lines with stability and reduced slip, helping you draw precise, evenly spaced lines every time. - Versatile for circles and ovals: A round hole every centimeter enables easy construction of circles and ellipses, making it useful for layouts, diagrams, and curved elements. - Clear measurements and quick calculations: The measuring roller features clearly printed scales and multiple formulas on the roller to support fast, accurate calculations during drawing. - Lightweight and portable: Made from transparent plastic, the ruler is easy to carry and its clear material improves visibility and positioning while drawing. - Practical use scenarios: - Technical drawing and drafting: Create accurate parallel lines and circular/elliptical marks on architectural or mechanical sketches. - Education and geometry: Demonstrate circles, ellipses, and proportional measurements in classroom activities. - Crafting and pattern work: Lay out precise patterns on paper, fabric, or lightweight materials for crafts and model making.