This dough hook was manufactured by Hobart Corp. for the Hobart N50 commercial 5 quart mixers.  It is made of aluminum and will last a life time.  Genuine "HOBART" and "N5ED" stampings shown in picture.  However every dough hook is different and the stampings may not match the picture shown identically as some are more faded than others and the location of the stampings is slightly different on every dough hook.  This dough hook will also work on the vintage KitchenAid Model G, 5 quart stand mixers.  It will not fit any other model mixer.  If you are unsure about fit with your mixer, ask questions before buying as there are no returns.