Pair these holders with a threading insert or a grooving insert to make cuts on the inside of a hollow workpiece. A highly-rigid clamping design results in a smoother finish and superior tool life. They are compatible with top-notch style threading and grooving systems.

Use a right-hand internal holder with a left-hand insert when the workpiece is rotating counterclockwise (toward the lathe operator).

Use a left-hand internal holder with a right-hand insert when the workpiece is rotating clockwise (away from the lathe operator).

These tools come with one high-speed steel insert for use on steel and stainless steel and one high-speed steel insert for use on softer materials, such as aluminum and brass. When one point of an insert dulls, rotate it to use a sharp point. When all points dull, replace the insert rather than the whole tool.

Tool with 1/2" shank can cut external right-hand threads with one end and internal right-hand threads with the other.

Made of solid carbide, these tools provide more rigidity than carbide-tipped tools. Use them to create internal Acme threads or V-shaped UNC, UNS, and UNF threads. All have flats on the shank for quick alignment.

A carbide tip brazed onto a ground steel shank makes these tools less brittle than solid carbide tools. They are designed to cut V-shaped UNC, UNS, or UNF threads on the inside of a workpiece.