School Smart Ball Bearing Compass with Long Point is a must-have for geometry and technical drawing. Compass consists of two parts (a long point with spike at end and an included pencil with positive lock) that are connected by a hinge that is easy to adjust to draw your desired smaller or larger circle. This tool can draw up to a circle 12 inches in diameter as a maximum. Metal design has nickel finish. Sold as 12 compasses per pack.