Offering top quality and performance the TTO Tungsten Worm Weights Weights are built to meet the needs of avid and tournament anglers alike. Made from 97% pure tungsten, the TTO Tungsten Worm Weights are much smaller and denser than lead weights of the same size, which provides a more compact profile to slip in and out of cover with ease and increased sensitivity to feel the lightest bites and changes in bottom composition.