What is a Counterboring drill?

A counterbore drill is a tool for drilling counterbore holes. Also called a fosner bit, there is also a type that can be attached to an electric drill or impact driver. Counterbore holes are cylindrical holes that fill screws and bolts. By tightening screws and bolts in the counterbore, the tip does not protrude from the wood and the surface does not become uneven. This process is necessary when you want to make the appearance beautiful or when a flat surface is required due to the structure. The counterbore drill blade is special and can flatten the bottom of the hole.

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