Used to most of the rock lay drilling including water-bearing sandy soil, sluge, clay, muddy sub clay, sandy gravel, cobble and weathered soft formation. Double bottom structure, not easy to leakage. Users can choose cylindrical and conical type depend on the buckets diameter, drilling rig model and soil conditions .Connecting shaft is modulated in high strength. The Body and guard strip material is high strength of MnQ355B steel plate. The bucket is high efficiency of teeth entering with carbide teeth holder, fast dumping,low wearing of cutting teeth, long serving life, large welding area.