Tungsten is an especially strong metal that can be used to make lots of different things, such as high-speed cutting tools and rocket engine nozzles. It is also the metal of choice for the barrel of steel tip darts. If you have ever watched a professional dart game, the odds are that the players were using darts with tungsten barrels. Though you might not think of it, darts take a lot of punishment through their lifespan, which is why tungsten is used so often. It is extremely durable.