The use of a clonk is immensely popular within catfish fishing, and for good reason. The sound and vibration of a clonk lures catfish! This clonk is the result of all the knowledge gained by experienced catfish anglers during 25 years on the water. The clonk has a body of wood. The head is made of hardened plastic and has a heart-shaped design. This shape creates a unique sound/vibration. In addition, the hardened plastic resists damage, such as hitting the side of the boat.