A bit for enlarging the upper part of a hole
English: counterbore, countersink, countersink bit
countersinkEnglish
countersink, counterbore, countersink bit, set
Noun
A hole (usually in wood) with the top part enlarged so that a screw or bolt will fit into it and lie below the surface
English: countersink
Verb
Insert (a nail or screw below the surface, as into a countersink)
English: set, countersink
Bahasa: terbenam, mengeset, menepatkan