Counterboring with a drill is desirable when preparing holes to receive screws that will be plugged.

• A. To Create Decorative Holes
• B. To Receive Screws That Will Be Plugged
• C. To Remove Material Quickly
• D. To Align The Drill With The Pilot

Answer: (B)

When you want to hide a fastener, counterboring is used to create a recessed space that will later be covered by a plug. The counterbore drill cuts a cylindrical, flat-bottomed hole that is larger in diameter than the screw shank but only shallow, so the screw head sits below the surface. After driving the screw, a matching wooden plug is glued into that counterbored hole and then flush-sanded. The plug fills the recess and hides the screw, leaving a clean, continuous surface.

This approach isn’t about decorative holes, rapid material removal, or drilling alignment with a pilot—those are different tasks. The purpose here is to provide a concealed mounting hole that can be plugged for a seamless appearance.