Great Lakes Tungsten weights are made from 97% pure tournament grade tungsten. This eco friendly lead alternative is not just better for the environment, but will help you catch more fish! Tungsten is around 35% smaller than the equivalent lead weight allowing it to be much more subtle and unobtrusive regardless of which presentation you decide to throw. Size is not the only benefit, Tungsten is far more dense than lead. This increase in density allows for much greater sensitivity while fishing bottom contact applications.