PCBN (polycrystalline CBN) is a synthetic tool material made in a way similar to PCD. The difference is that instead of diamond grains, CBN (cubic boron nitride) grains are used. PCBN is mainly applied to the machining of the following materials: tool steels, high-speed steels and high alloy steels.

PCD represene diamond, it is a superhard synthetic abrasive. Mostly  used for processing of cutting nts polycrystallitools. It is composed of micron-sized with very hard diamond grains. These grains are bound by metal bonds and placed on a sintered carbide base. That makes it possible to create a product with excellent properties, which is broadly used in machining.