4 in 1 Multifunction Protractor Angles Measuring Ruler Designed for students, engineers, and creative professionals who require professional measuring instruments for technical drawings and artistic designs. Built to withstand demanding academic and professional use, maintaining calibration integrity through repeated use. Portable geometry drawing tool that replaces multiple drafting instruments, enhancing efficiency in classroom, office, home, or workshop. The 4 in 1 design combines precise measurement with an adjustable circular drawing ruler, making it ideal for architects, artists, and scrapbooking craft enthusiasts. Key attributes: precise measurement, adjustable circular drawing ruler, portable and versatile for a range of drafting tasks. Use scenarios: In the classroom for geometry lessons and drafting assignments requiring quick angle and arc measurements In architectural or engineering design rooms for quick layouts, angles, and circular elements In arts and crafts projects such as scrapbooking or model making that require accurate circles and angles