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The Metals Service Center Institute (MSCI) celebrates its centennial this year with a video dedicated to the daily importance of four conspicuous metals: iron, carbon, nickel, and aluminum. Although manufacturers deal with these materials on a daily basis, it’s easy to forget how our lives outside of work would be significantly different without them.

The video asks a simple question: what is the single most important item in your life? Odds are, it’s made with one of those four metals.

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