Use these tools to enlarge existing holes to precise diameters.

Insert the square shank of these tools into the slot of a boring tool holder and use them to enlarge existing holes to precise diameters.

An extra-long shank provides additional reach.

An extra-long shank provides additional reach.

These sets contain some of the smallest boring tools we offer.

Reduce tooling setup time—install the holder once and alternate between applications by switching out the bit.

Deliver coolant through the holder to keep workpieces cool while boring tough materials, such as steel, stainless steel, and nickel-based alloys.

Use these tools to enlarge existing holes to precise diameters. They come with an insert installed. When one edge of the insert dulls, rotate it to use a sharp edge.

Contour the interior wall of a hollow workpiece when you pair a holder with a compatible insert.