____ are used to enlarge a predrilled hole to very precise size and roundness.
A) Twist drills
B) Reamers
C) Insert-tooth drills
D) Borers

Question

Quizplus · Accepted Answer

Reamers are specifically designed for enlarging predrilled holes to precise sizes and shapes. Twist drills, insert-tooth drills, and borers are used for drilling new holes or enlarging holes to a lesser degree of precision.

____ Are Used to Enlarge a Predrilled Hole to Very