Blackboard Compatibility: Designed for use on blackboards, allowing teachers to easily draw shapes and diagrams during effective teaching. Engineering tool, compass tool. Adjustable for Accuracy: Easily adjustable to select the desired radius, providing accurate and precise drawings every time. Compass writing instrument, drawing accessories. Ideal for Teaching: For classroom demonstrations, helping students better understand geometric concepts with visual aids. Children's compass, drawing tool. Easy Radius Selection: Offers easy and flexible radius selection, ensuring accurate and practical drawing of circles and geometric figures. Cute school supplies for girls, study tools. Easy Radius Adjustment: Offers a flexible adjustment mechanism to select the radius, ensuring accurate and precise drawings. Perspective drawing tool, whiteboard teaching compass.