APFDBSE double bottom single side soil entry rotary drill bit
APFLBA Auger and core barrel bit
APFSBDE Single Bottom Bilateral Soil Entry Pilot Rotary Drill Bit
APFSBDE Single Bottom Bilateral Soil Entry Rotary Drill Bit
APFSBSE single-bottom single-side soil entry pilot rotary drilling bit
APFDS-FR Double Start Standard Auger
APFDS-R Double Start Rock Auger
APFDS-R2 Double-head straight screw frozen soil short spiral drill bit
APFDS-S Double-end straight screw bucket tooth short spiral drill bit
APFDS-TR double cone single screw rock short spiral drill bit
APFDS-TR2 Double Cone Double Screw Rock Short Spiral Drill Bit
APFDX Double-headed Straight Spiral Rotating Bottom Door Bucket Teeth Short Spiral Drill