Drilling rod: made by CNC, and multi-heat treat, with premium alloy ... )We produce a wide range of drilling tool including drill rod, wireline core barrel (AQ-PQ) and assemblies, synthetic diamond core ... with products of outstanding quality and satisfied service.1.Drill rod: BQ, NQ, HQ , PQ , NT, HT casing tube: BW, NW ... wrench, foot clamp,etc. BQ NQ HQ PHD HWT drill rod, multi-heat treat, 5ft and 10ft