The Metal Trades Department is a trade department of the AFL-CIO. It was chartered in 1908 to coordinate negotiating, organizing and legislative efforts of affiliated metalworking and related crafts and trade unions. Twenty national and international unions with a total membership of over 5,000,000 are affiliated with the MTD today. More than 100,000 workers in private industry and federal establishments work under contracts negotiated by MTD Councils. Workers retain membership in their own trade unions.