... 11 5/8", 12 1/4", 13 5/8", 14 3/4", 15 1/2", 16", 17 1/2 ... Oceania, Mid East, Eastern Asia, Western Europe3.The PDC cutter features1.long life-employing new sinter technics firms the ... layer and tungsten carbide, reduces reidual stress of PDC diamond compact cutter, and increase impact resistance.Themal ... ,which makes reliable quality and better performance when PDC used in the drilling bits.3.Nearly all ...