PDC Drill Bit 6 blades 1.Bit Body:Matrix 2.Blade:6 ... , 9 1/2,11 5/8, 12 1/4 PDC Drill Bit 6 blades1.Bit Body:Matrix2.Blade:63.Cutter Size ... , 9 1/2,11 5/8, 12 1/41 AdvantageOptimized short parabolic profile,suitable for drilling soft to medium soft homogeneous ... /811 5/86710066 5/812 1/47012066 5/8 PDC Drill Bit 6 blades