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Spiral Style. Used to remove broken screws, bolts, threaded parts, and pipes quickly and easily. Broken piece is extracted without damage to threads. Type 420.
Used to remove diameter: 1-1/8 to 1-3/8 & 3/4 pipe Corresponding Drill Size: 13/16 To remove the broken threaded part: Drill a hole in the end of the broken part (left hand spiral heavy duty drills are recommended for this drilling operation), insert extractor, then turn counterclockwise using a wrench on the exposed end of the extractor.