This scale-arm compass features easy to read graduation arc in both inches and metric. Makes circles to 12" diameter. Includes 3-1/2" #2 HB pencil. Features a safe, blunt metal tip compass that is perfect for any student. It is one of the safest compasses on the market. Come in assorted color combinations. The semicircular 6" protractors feature pivoting arm for easy measuring at any angle as we as a cut out center for easy finger lift.