Tungsten has been used since the 1970's in making tungsten billet, because it is twice as dense as brass, a dart made of tungsten will be half the size of its brass equivalent, which means that it is easier for the player to achieve close grouping and score more.
Tungsten is found in igneous rock, then crush it to powder and the tungsten content is separated out. Next blend pure tungsten powder with Ni, Fe or Cu, ball milling the mixture, and mixed with binder such as alcohol, paraffin. Then press the mixed powder with high pressure mould into shape, sintering in a furnace at 3000ºC, then blank tungsten rod is successfully produced. The last process is grinding the blank tungsten rod to required size.