Foundation drilling tools,Rotary Drilling bits,Trenching bits,Tunneling tools,Rock drilling ,auger bits,auger drilling bit. We can offer construction conical bits for foundation drilling, rotary drilling, trenching, tunneling, mining etc, aslo casing bits and cutters for shield machine.Round cutter Parts No.as C31HD, B47k17H, B47k19H, B47k22H,Flat cutter Parts No. as BFZ80, BFZ70,Bucket teeth ...