Sollroc COP66 DTH Hammers & DTH Bits

We mainly producing: 4-18" High air pressure down the hole DTH hammers & Bits (DHD, COP,SD,QL,Mission,Mach,NUMA shank & our designer items,etc.) 1-3" Middle-low air pressure down the hole DTH hammers & bits(BR,CIR,J shank,etc.)/ Drill rods,drill pipes Reverse circulation DTH hammers & bits Overburden casing systems Top hammer drill bits,retract button bits Hole opener bits