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Knipex Double-Edged Screw Extractors are for unscrewing damaged screws and bolts without damaging threads. They are for both right and left handed threads and have non-slip and double-edged engagement with the screw being removed.
| PART # | SIZE | DRILL DIAMin / Max | DRIVING HEXHEAD SIZE | BOLT SIZEMin / Max |
|---|---|---|---|---|
| KNI9R 471 001 3 | 1 | 1/8" / 3/16" | 1/4" | 3/16" / 1/4" |
| KNI9R 471 002 3 | 2 | 3/16" / 9/32" | 5/16" | 5/16" / 3/8" |
| KNI9R 471 003 3 | 3 | 1/4" / 3/8" | 7/16" | 7/16" / 1/2" |
| KNI9R 471 004 3 | 4 | 11/32" / 1/2" | 1/2" | 1/2" / 9/16" |
| KNI9R 471 005 3 | 5 | 7/16" / 5/8" | 9/16" | 5/8" / 3/4" |
| KNI9R 471 006 3 | 6 | 9/16" / 3/4" | 3/4" | 7/8" / 1" |
| KNI9R 471 007 3 | 7 | 3/4" / 15/16" | 1" | 1" / >1" |