high quality, best price, use for long SpecificationsPDC Drill Bits 1.Bit Body:Matrix 2.Blade:6 3.Cutter Size:16mm ... 4.Bit Size (in) 6, 8 1/2, 9 1/2,11 5/8, 12 1/4 1 AdvantageOptimized short parabolic profile,suitable for ... )APIreg.pin.size (in)6245553 1/28 1/2396764 1/29 1/2438566 5/811 5/86710066 5/812 1/47012066 5/8 PDC drill ...