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Drilling Bit
Inner Opener Bits
Specification Of Inner Opener Bits
 | D1(mm) | D2(mm) | D3(mm) | Gauge button | Front button | Thread |
| 125 | 118 | 88 | 16 | 14 | T104.5 | |
| 140 | 133 | 108 | 16 | 14 | T122 | |
| 152 | 133 | 108 | 16 | 14 | T122 | |
| 172 | 165 | 133 | 16 | 14 | T146.5 | |
| 225 | 216 | 178 | 16 | 14 | T203 |
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