center punch

noun
a punch for making shallow indentations in metal work, as to center drill bits.

Origin:
1875–80

Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Example sentences
It is important to center punch the hole and use a drill bit smaller that the bolt hole.
The decedent was using the machine to center punch holes into metal plates when the incident occurred.
Use center punch on all holes to prevent drill from wandering.
Before fastening any questionable material, the operator shall determine its suitability by using a fastening as a center punch.
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