The Mr. Pen Professional Metal Compass with Lock is built for consistent precision—an essential tool for design projects, whether you’re an experienced artist or a student just starting out. Made for design projects: The ultimate tool for producing precise shapes consistently Comprehensive set for versatility: Includes a precision compass , spare lead , needles , screws , and nuts Spring-loaded head + center wheel: Helps prevent unwanted leg movements for better stability and precise control Classic, simple design: Easy to operate and control for everyday geometry, drafting, and drawing work Quick circle size adjustments: Adjust the circle size swiftly for efficient workflow Reliable precision: A must-have addition to any design tool arsenal when accuracy matters