Alvin 205V 6" Professional Speed-Bow Compass Beam Bar Set

Made from zinc alloy with a matte chrome finish. Sturdy push button mechanism allows for quick adjustments, while the red spindle can be used for more finite adjustments. Features a double break leg for precise execution of circles up to 12 inches in diameter (up to 18 inches with included beam bar). Includes replacement lead and universal pen adapter. Packaged in a hard, see-through plastic case.