The hammer and sickle are a part of communist symbolism and their usage indicates an association with communism, a communist party, or a communist state. This symbol features a hammer and a sickle overlapping each other. The two tools are symbols of the industrial proletariat and the peasantry; placing them together symbolizes the unity between industrial and agricultural workers. This emblem was conceived during the Russian Revolution. It is best known from having been incorporated into the red flag of the Soviet Union and the Chinese Communist Party, along with the red star. It has also been used in other flags and emblems.