The Frog, Switch and Manufacturing Company is a worldwide leader in manganese steel castings specializing in replacement parts for the Mining, Aggregate, and Shredder Industries.

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• The Aggregate Industry - We've been an established supplier of manganese wear parts to the aggregate industry for over half a century.

• The Mining Industry - Mines worldwide utilize Frog, Switch castings in the production of various metals including iron, gold, copper, molybdenum, and silver.

• The Shredder Industry - We supply wear parts to scrap shredders all over the world.