Features: The 4 in 1 Multifunction Protractor Angles Measuring Ruler combines precisely measurement with adjustable circle drawing ruler, great compatible with architects, artists, and scrapbooking craft enthusiasts. Features double angles measurement/circle drawing functions, this Multifunctional geometry drafting tool simplifies complex geometric tasks. Suitable compatible with students, engineers, and creative professional requiring professional measuring instruments compatible with technical drawings and artistic designs. Optimize efficiency in classroom, office, home or workshops with this portable geometry drawing tool that replaces multiple drafting instruments. Engineered with plastic construction, this multifunctional protractor geometry drawing ruler measuring tool maintains calibration integrity through repeated use in demanding academic and professional environment. Specifications: Component: Plastic Color: Clear Blue Size: Approx. 13.2x9.2cm/5.19x3.62in Size: Approx. 16.5x11.2cm/6.49x4.4in Weight: Approx. 35g, 45g Package Includes: 1Piece Multifunctional Protractor note: 1.Please allow 0-1cm error due to manual measurement. Be sure you donot mind becompatible withe bid. 2.Due to difference between different monitors, the picture may not reflect the actual color