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Supreme PDC (Polycrystalline Diamond Compact) rock cutter blanks consist of polycrystalline diamond layer sintered with tungsten carbide substrate under ultra-high temperature and ultra-high pressure. Combining the strengths of both diamond and tungsten carbide, the process renders to the products a combined quality of extremely high abrasion resistance and extremely strong impact resistance ability. The standard shape of our Supreme PDC products is round, but other special shapes (rectangle, triangle, and so on) can also be custom-made per customers' requirements. Supreme PDC is specially designed for various drilling tools such as petroleum bits, mining bits, and other geological drilling bits, suitable for use in soft to medium hard rock formations .1. SJ I Series: Standard PDC. Suitable for making coal-mining bits and other geological bits. 2.SJ II Series: High Abrasion Resistance PDC. It has more hardness and strength, stronger impact resistance ability, and higher abrasion resist