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	What is the difference between nonferrous metals and nonmetals?
	Can I use the external contact method (energized type)? In this case the metal is iron. Please use [internal contact method]. Non-ferrous metals are written as non-ferrous metals and refer to aluminum, copper, brass, gunmetal. Iron is a metal. Since electricity flows, please use [external contact system] (energized type).

	※Since the film of Al₂O₃ on the surface of alumite-treated aluminum, [external contact type] can not be used.
	Products that are relevant to this question is as follows. It will jump to the corresponding page by clicking. [Point Finder Series]　　[Centering Gauge Swing Type] [Tool Setter Series]

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