... .EW,AW,BW,NW,HW Drill Rod 4.Tapered Drill Rod Core Drill RodDrill Rod & Coupling (AQ,BQ,NQ,HQ,PQ Drill RodEW ... ,AW,BW,NW,HW Drill Rod )Geotool drill rods are manufactured from cold drawn seamless steel ... are flush-coupled and a coupling is supplied with each rod length. Unless other wise shown on the following specification table ...