... mining tools, DTH Drilling tools. construction tools and excavating coal pick cutter tools.1.Integral drill ... in most lengths.button bits, cross type bits and chisel bits with(6,7,11,12 degree taper). ... )Offer ir hammers,DHD3.5,DHD340a,DHD360,DHD380,and low pressure hammers CIR65a, CIR90, CIR110, CIR150 ... cutter bitsInclude all kinds of round cutter bit and flat cutter bits for excavate coal machine ...