Tungsten alloy cube is widely used in military defense, such as: shot gun, armor piercing bullets, penetrates armor, mutilate tanks, self-propelled guns, armored vehicles, ships, aircraft, or any other armored target. It used in military defense because it has the good properties: high density with small volume, perfect hardness, superior wearing resistance, high temperature resistance, good corrosion resistance, wonderful shock resistance, the most important point is non-toxic and environmentally friendly, so it is the best substitute of lead in military field.