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UKCountersink bit
/kˈaʊntəsˌɪŋk bˈɪt/
/kˈaʊntɚsˌɪŋk bˈɪt/Countersink bit
[NOUN]1
a specialized drill bit with a tapered end used to create a conical recess at the top of a drilled hole, allowing screws or fasteners to sit flush with or below the surface of the material
