STURDY & ACCURACY. Made of steel withstands bending under pressure to maintain accuracy. Metal construction for long lasting use. Exquisite mechanism provide smooth use. All Metal. Nickel plating. EASY TO USE. Scale-arm, easy grip top control with two-sided 6-inch / 15-centimeter measuring. Metal point makes circles up to 12" in diameter. IDEAL DRAFTING. Includes 3 1/2 #2 HB golf pencil with secure lock allows quick adjustment as needed. Great for drawing arcs, circles, divide gauges, dividing line, line segments, size measurement. PERFECT ANGLES. Perfect for precise drawings. Trace and draw the perfect angle, circumferences, graphing, and design with our easy-to-use compasses. MULTIPURPOSE. Excellent for use in school, office, studio, or at home. The best circle drawing tool for student, artist, mathematician, carpenter, engineers, architecture, and designer