What is the hardness of Poly Crystalline Diamond tool?

It refers to some other special diamond tools which can also be applied in grinding or cutting applications in many industrial fields. A diamond tool is a cutting tool with diamond grains fixed on the functional parts of the tool via a bonding material or another method. As diamond is a superhard material, diamond tools have many advantages as compared with tools made with common abrasives such as corundum and silicon carbide.