Carbide turning inserts, like all other metal cutting tools, are identified with a series of letters and numbers. These refer to the Turning Tool ISO code system that provides a (relatively) simple way to identify carbide inserts.

When choosing the right size of carbide insert, always determine the largest depth of cut. Consider the cutting length while determining the tool holder entering tool, depth of cut, and machine specification.

An insert's material, or grade, is designed to suit a particular machining application, and even though two inserts may look the same, the base material and the coating (if there's one) can be very different.