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center punchA pointed hand tool made of hardened steel and shaped somewhat like a pencil.
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center punchA tool used for making small, conical depressions in ductile materials (doesn't work in glass, etc) to mark the location of holes. These depressions are then used by the machinist (using acenter [..]
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center punch
to create a small hole or indentation in a workpiece as a guide in preparation for drilling
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