Meet the Mr. Pen Convertible Compass—built for precise, reliable circles in geometry, drafting, and technical drawing.

Why you’ll love it

• Precision + versatility: Designed for geometry work, drafting, and technical drawing tasks
• Durable metal frame: Strong build for steady control and long-lasting use
• Comfortable handling: Ergonomic features for stability and comfort for students and professionals
• Draws up to 5 inches: Creates circles up to 5" in diameter for math, art, and design applications
• Ready to keep going: Includes extra lead refills plus a sharpener for continuous, hassle-free use
• Consistent results: Adjustable locking mechanism helps maintain steady, repeatable circles
• Portable essential: Compact and easy to carry—great for classrooms, offices, or on-the-go projects