Characteristics: Advanced geometry tool: ideal for advanced geometry tasks, this compass allows for precise angle and circle measurements, essential for complex drawings compasses kit. Easy adjustments: the easytouse adjustment knob allows for quick and smooth changes in radius, enhancing efficiency in your work school compass. Robust build: constructed with materials, this compass is designed to last, providing reliable performance over time math compass. High accuracy: the digital ensures high accuracy, making it suitable for professional drafting and engineering geometry compasses. Teaching aid: an excellent tool for teaching geometry concepts, helping students visualize and understand geometric principles better compasses set. Specification: Material:Plastic compass. Size:15.00X5.00X2.50cm/5.89X1.97X0.98in drafting compass. Package includes: 1pc * compass,20pcs * Replacement core. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.