Balance Weights are used in the tails of aircraft, pendulums, eccentric loads for rotors to cause vibrations and tungsten alloys which have low volumes and high densities are used as materials. 

 In the past, lead was frequently used for the role although it is currently prohibited from using as an environmentally harmful material. Tungsten alloys are used for many uses because of their advantages such as environment friendliness, good processability and high density characteristics.