The jig head is made of 97% density tungsten, not tungsten compound. Better than Lead - 40% smaller and 200% more sensitive than the lead made jig head. No chip or fade - With special solvent treatment and coating, Nako tungsten jig heads are more robust and durable than lead weights or the other brand. Equipped with the super sharp and strong Nako nano smooth coating 9150 jig hook. Size Printed on Weights - It is easy to find the weight when fishing, most customers love this feature.