promotional metal keychain material:brass process:die struck injection:soft enamel size:according to client's inquiry promotional metal keychain Materialzinc alloy,brass,iron,stainless iron,aluminum etcProcessDie struck, Die cast, Stamped, Photo Etched, Soft enamel, Cloisonne, Imitation Cloisonne, offset printed.Platinggold,antique gold,,silver,antique silver,bronze,antique bronze,copper,antique ...