... 1.Sturdy & effective for rock drilling 2. Available in all sizes 3:ISO Certificated 4:Long service life DTH drill ... , etc3,Drag bits including Step and Chevron types with "API Reg", "NRod" thread.Claw tybe bits, Clay bits, ... T6,WF,WG,etc), reaming shell, core barrel and drill rods.etc.5,Rock anchor tools, IBO anchor system( ... nut, plate,coupling.), Rebar rock bolting, Friction bolting. etc. Drill pipe