The rotary drilling flat rock augers suitable for very dense sand and gravel，single cut augers and double cut augers are suitable for drilling in medium to strong rock (15~60 MPa). Double cut auger is recommended in uncased bores or for bigger diameters and secant pile walls. Kelly box diameter options have 130mm,150mm,200mm.

The rotary drilling cone augers are used for drilling holes in dry soil and rocks, suitable for formations such as pebble layers, mudstone, sandstone layers, and strongly and moderately weathered hard rock layers. The double headed auger is subjected to uniform force and should not deviate from the hole, it has strong slag carrying capacity, viscous formation, and single helix is easy to unload slag.