Annic Adjustable Rotating Wing Divider Caliper DIY Leathercraft Scriber Tool Made of high quality metal material, durable and rustproof. The legs feature hardened points for precise marking of the work piece, an adjusting screw has a self-seating washer and nut to permit quick and positive adjustment. Length: Approx. 5.7 inches. Plot curves, border lines, adjust patterns, and space lacing holes. Great for all kinds of measuring, scoring and craft applications.