Precision Fit: Designed specifically for Pacific Arc compasses and dividers, ensuring a perfect fit for accurate technical drawings and drafting. Durable And Reliable: Each part is crafted for durability, providing long-lasting performance for all your drafting and geometry needs. Versatile Use: Ideal for use in a variety of professional, educational, and artistic applications, from technical drafting, woodworking, architecture, or, geometry. * Parts & Lead * Needles * Extension Bar