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__________________ is used in a power or hand drill to form the conical recess for the heads of countersunk screws.

__________________ is used in a power or hand drill to form the conical recess for the heads of countersunk screws. Correct Answer Countersink bit

Countersink bits tends to be designed for use on soft materials such as Timber and plastics, not metals. When used with a power drill to countersink an existing hole, the bits tends to chatter, leaving a rough surface. Better results will be obtained in the counter sink bit is used before the hole is drilled.

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