5 1、4 IADC537 Pilot Bit

6 1、2 IADC537 Pilot Bit

6 IADC537 Pilot Bit

7 1、2 IADC537 Pilot Bit

7 7、8 IADC537 Pilot Bit

8 1、2 IADC517 Pilot Bit

8 1、2 IADC637 Pilot Bit

9 1、2 IADC537 Pilot Bit

9 7、8 IADC517 pilot bit

9 7、8 IADC537 Pilot Bit

10 HDD hole opener

12 HDD hole opener