The Koh-I-Noor Rotring Small Bow Compass is engineered for precision, rugged durability and performance. It draws circles up to 4" in diameter and includes a lead insert and spare point vial. Made of brass with a velour nickel-plated finish, this compass has a 3.5mm insert socket. Made in Germany. 4-1/2 inches long. Koh-I-Noor - bringing you the best in professional grade drawing and design.