Prym Tailors Chalk Wheel with Toothed Wheel, Ergonomic Design for Sewing and Dressmaking Ergonomic Chalk Wheel with Toothed Wheel Tracing wheel produces fine chalk lines Owing to recessed grip for index or middle finger, the stick adapts to the user's individual hand position Ergonomic design, facilitates fatigue-free working Easy to use- every crafter needs this quality Prym item