... Drilling Tools:Retract Button Bits, Chisel Bits,Drill Rods,DTH Hammers & Bits,Shank Adaptors,Coupling ... hydraulic rock drills, etc. 5. Diamond core drilling tools including the diamond core bits(BQ, NQ, HQ, PQ, ... TT, T2, T6, etc), reaming shell and core barrel. 6. Others including light rail, rock anchoring tools ... products and hearted service. Tricone Drill Bit/Rotary Drilling Rig/Hot ...