STURDY & ACCURACY. Our scale arm compass with a perfect grip which is just ideal for a perfect hold of the compass. Exquisite mechanism provide smooth use for the purpose of measuring angles. 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