Install these inserts into a compatible holder to cut external or internal threads on a workpiece.

Pair these holders with a threading insert or a grooving insert to make cuts on the inside of a hollow workpiece.

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.