Based on results of years of researches on construction methods, Unidrill has developed rotary drilling tools with the characteristics of high efficiency, easy maintenance, long service life, etc. applicable for different soils conditions. Rotary augers we develop and manufacture include soil straight auger with single end and single screw, soil straight auger with double ends and single screw, soil straight auger with double ends and double screws, rock-socketed straight auger with single end and single screw, rock-socketed straight auger with double ends and single screw, rock-socketed conical auger with double ends and single screw, rock-socketed conical auger with single end and single screw, rock-socketed conical auger with double ends and single screw, rock-socketed conical auger with double ends and double screws and other specifications, buckets include soil and rocks buckets, to be specific, soil bailer buckets with double bottoms, soil bailer buckets with single bottom, rock-socketed bailer buckets with double bottoms, rock-socketed bailer buckets with double bottoms and single door, and core barrels include rock-socketed core barrels, cruccross core barrels, trident core barrels and roller core barrels, etc.