Pcd blanks are currently produced in self-supported or tungsten carbide supported blanks that are more often used in ferrous wire drawing applications. Self-supported blanks are generally offered in two grain sizes ( ≤1-5 micron) and two grades ( thermally stable catalyst metal removed-TS , and metal filled ,contains catalyst metal-MF). Tungsten carbide supported blanks have a core integrally bonded to a tungsten carbide supported ring. http://www.natust.com/cutting-tool/