- Professional woodworking compass with a sliding speed nut for quick, smooth adjustments until contact with the center collar. Needle-point metal tips provide strong engravings and resist slipping. - The pencil compass tip is high strength, not easily deformed, and durable. An adjustment knob allows you to control the grip length of the pen. - Drafting compass and circle maker: a great tool for creating contours and circles, and also suitable for edge marking. Can be used with a pencil or ballpoint pen. - Large compass for geometry and woodworking: a versatile tool suitable for school, woodworking, or home use. A reliable circle drawing tool for students, artists, mathematicians, and carpenters. Use scenarios: - Mark circular layouts on wood, plywood, or panels for cabinetry, furniture components, or decorative inlays. - Draw precise circles and contours for geometry homework, math projects, or technical drawings. - Use for edge marking and layout work in carpentry or craft projects, with either a pencil or ballpoint pen.