Rounds, unlike Coins, do not have any face value and they are not legal tenders, they are simply coined pieces of metal minted by private manufacturers. Rounds are used to own metal, copper, silver, gold). They have no value other than the value of the metal in them. Different from Coins, Rounds are not authorized by governments.
Rounds commonly are copies made as attribute to original coins; or medallion made to commemorate a historical event, or to pay recognition to special characters, individual in history, or outstanding athlete, or religious icon.
Rounds are also made as a token to visually express your opinion and show your stand in some polemic and sometimes controversial political, social or religious issues affecting the world at any given moment.