... , CIR90, CIR110, CIR150,CIR170etc,DTH drill bits:60mm-254mm bits with flat face, concave design fit for the atlas copco and ingersoll-rand ... bitsInclude all kinds of round cutter bit and flat cutter bits for excavate coal machine as the replacements of kennametal. Such as ... bit and coal bolting rod.6. All kinds of casing bits for shield machine and construction tools.7. Round road planing bit ...