Includes six parts. Ideal for removing broken screws, bolts and threaded parts. Also for turning threaded pipe sections.
| Helical Flute Size | Drill Size | Screw/Bolt Size | Pipe Size |
| #1 | 5/64″ | 3/16″ to 1/4″ | N/A |
| #2 | 7/64″ | 1/4″ to 5/16″ | N/A |
| #3 | 5/32″ | 5/16″ to 7/16″ | 1/16″ |
| #4 | 1/4″ | 7/16″ to 9/16″ | 1/8″ |
| #5 | 17/64″ | 9/16″ to 3/4″ | 1/4″ |
| #6 | 13/32″ | 3/4″ to 1″ | 3/8″ |








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