... .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 ... " Series rods are flush-coupled and a coupling is supplied with each rod length. Unless other wise shown on the ... rods are available to special order. Core Drill Rod & Coupling