... taper rods in most lengths.button bits, cross type bits and chisel bits with(6,7,11,12 degree taper ... .4. Down the hole hammers and DTH button bits (Down The Hole Drilling)Offer ir hammers,DHD3 ... CIR65a, CIR90, CIR110, CIR150,CIR170etc,DTH drill bits:60mm-254mm bits with flat face, concave design fit for ... kinds of round cutter bit and flat cutter bits for excavate coal machine as the replacements of ...