... taper rods in most lengths.button bits, cross type bits and chisel bits with(6,7,11,12 degree taper ... CIR65a, CIR90, CIR110, CIR150,CIR170etc,DTH drill bits:60mm-254mm bits with flat face, concave design fit for the ... kinds of round cutter bit and flat cutter bits for excavate coal machine as the replacements of ... tap hole drill tools.(Rod, Cross type bits, button bits and X type bits etc)v drill pipe