blank metal keychains material:brass process:die struck plating:nickle size:according to client's inquiry blank metal keychains 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 copper,nickle, ...